""" Radiology app views with healthcare-focused CRUD operations. Implements appropriate access patterns for radiology and imaging workflows. """ from django.shortcuts import render, get_object_or_404, redirect from django.contrib.auth.decorators import login_required from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin from django.views.generic import ( ListView, DetailView, CreateView, UpdateView, DeleteView, TemplateView ) from django.http import JsonResponse, HttpResponse, FileResponse, Http404 from django.db.models import Q, Count, Avg, Sum, F from django.utils import timezone from django.contrib import messages from django.urls import reverse_lazy, reverse from django.core.paginator import Paginator from django.template.loader import render_to_string from datetime import datetime, timedelta, date import json import os import mimetypes from PIL import Image import numpy as np from core.utils import AuditLogger from .models import ( ImagingOrder, ImagingStudy, ImagingSeries, DICOMImage, RadiologyReport, ReportTemplate ) from .forms import ( ImagingOrderForm, ImagingStudyForm, RadiologyReportForm, ReportTemplateForm, ImagingSeriesForm ) class RadiologyDashboardView(LoginRequiredMixin, TemplateView): """ Main radiology dashboard with key metrics and recent activity. """ template_name = 'radiology/dashboard.html' def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) tenant = self.request.user.tenant today = timezone.now().date() # Dashboard statistics context.update({ 'pending_orders': ImagingOrder.objects.filter( tenant=tenant, status='PENDING' ).count(), 'scheduled_studies': ImagingStudy.objects.filter( tenant=tenant, status='SCHEDULED' ).count(), 'in_progress_studies': ImagingStudy.objects.filter( tenant=tenant, status='IN_PROGRESS' ).count(), 'studies_completed_today': ImagingStudy.objects.filter( tenant=tenant, completed_datetime__date=today, status='COMPLETED' ).count(), 'reports_pending': RadiologyReport.objects.filter( study__tenant=tenant, status='DRAFT' ).count(), 'reports_signed_today': RadiologyReport.objects.filter( study__tenant=tenant, # signed_datetime__date=today, status='SIGNED' ).count(), 'critical_findings': RadiologyReport.objects.filter( study__tenant=tenant, # has_critical_findings=True, status='SIGNED', # signed_datetime__date=today ).count(), 'total_images_today': DICOMImage.objects.filter( series__study__tenant=tenant, created_at__date=today ).count(), }) # Recent orders context['recent_orders'] = ImagingOrder.objects.filter( tenant=tenant ).select_related('patient', 'ordering_provider').order_by('-order_datetime')[:10] # Recent studies context['recent_studies'] = ImagingStudy.objects.filter( tenant=tenant ).select_related('patient').order_by('-study_datetime')[:10] # Recent reports context['recent_reports'] = RadiologyReport.objects.filter( study__tenant=tenant, ).select_related('study__imaging_order__patient')[:10] return context class ReportTemplateListView(LoginRequiredMixin, ListView): """ List all radiology report templates with filtering and search. """ model = ReportTemplate template_name = 'radiology/report_template_list.html' context_object_name = 'report_templates' paginate_by = 25 def get_queryset(self): queryset = ReportTemplate.objects.filter(tenant=self.request.user.tenant) # Search functionality search = self.request.GET.get('search') if search: queryset = queryset.filter( Q(template_name__icontains=search) | Q(modality__icontains=search) | Q(body_part__icontains=search) ) # Filter by modality modality = self.request.GET.get('modality') if modality: queryset = queryset.filter(modality=modality) # Filter by active status active_only = self.request.GET.get('active_only') if active_only: queryset = queryset.filter(is_active=True) return queryset.order_by('name') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'modalities': ReportTemplate._meta.get_field('modality').choices, 'search_query': self.request.GET.get('search', ''), }) return context class ReportTemplateDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about a report template. """ model = ReportTemplate template_name = 'radiology/templates/report_template_detail.html' context_object_name = 'report_template' def get_queryset(self): return ReportTemplate.objects.filter(tenant=self.request.user.tenant) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) template = self.object # Get recent reports using this template context['recent_reports'] = RadiologyReport.objects.filter( template_used=template, study__tenant=self.request.user.tenant ).select_related('study__order__patient').order_by('-created_at')[:10] return context class ReportTemplateCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView): """ Create a new report template. """ model = ReportTemplate form_class = ReportTemplateForm template_name = 'radiology/templates/report_template_form.html' permission_required = 'radiology.add_reporttemplate' success_url = reverse_lazy('radiology:report_template_list') def form_valid(self, form): form.instance.tenant = self.request.user.tenant form.instance.created_by = self.request.user response = super().form_valid(form) # Log the action AuditLogger.log_event( user=self.request.user, action='REPORT_TEMPLATE_CREATED', model='ReportTemplate', object_id=str(self.object.id), details={ 'template_name': self.object.template_name, 'modality': self.object.modality } ) messages.success(self.request, f'Report template "{self.object.template_name}" created successfully.') return response class ReportTemplateUpdateView(LoginRequiredMixin, PermissionRequiredMixin, UpdateView): """ Update an existing report template. """ model = ReportTemplate form_class = ReportTemplateForm template_name = 'radiology/templates/report_template_form.html' permission_required = 'radiology.change_reporttemplate' def get_queryset(self): return ReportTemplate.objects.filter(tenant=self.request.user.tenant) def get_success_url(self): return reverse('radiology:report_template_detail', kwargs={'pk': self.object.pk}) def form_valid(self, form): response = super().form_valid(form) # Log the action AuditLogger.log_event( user=self.request.user, action='REPORT_TEMPLATE_UPDATED', model='ReportTemplate', object_id=str(self.object.id), details={ 'template_name': self.object.template_name, 'changes': form.changed_data } ) messages.success(self.request, f'Report template "{self.object.template_name}" updated successfully.') return response class ReportTemplateDeleteView(LoginRequiredMixin, PermissionRequiredMixin, DeleteView): """ Delete a report template (soft delete by deactivating). """ model = ReportTemplate template_name = 'radiology/templates/report_template_confirm_delete.html' permission_required = 'radiology.delete_reporttemplate' success_url = reverse_lazy('radiology:report_template_list') def get_queryset(self): return ReportTemplate.objects.filter(tenant=self.request.user.tenant) def delete(self, request, *args, **kwargs): self.object = self.get_object() # Soft delete by deactivating instead of actual deletion self.object.is_active = False self.object.save() # Log the action AuditLogger.log_action( user=request.user, action='REPORT_TEMPLATE_DEACTIVATED', model='ReportTemplate', object_id=str(self.object.id), details={'template_name': self.object.name} ) messages.success(request, f'Report template "{self.object.name}" deactivated successfully.') return redirect(self.success_url) class ImagingOrderListView(LoginRequiredMixin, ListView): """ List all imaging orders with filtering and search. """ model = ImagingOrder template_name = 'radiology/orders/imaging_order_list.html' context_object_name = 'imaging_orders' paginate_by = 25 def get_queryset(self): queryset = ImagingOrder.objects.filter(tenant=self.request.user.tenant) # Search functionality search = self.request.GET.get('search') if search: queryset = queryset.filter( Q(patient__first_name__icontains=search) | Q(patient__last_name__icontains=search) | Q(patient__mrn__icontains=search) | Q(study_description__icontains=search) ) # Filter by status status = self.request.GET.get('status') if status: queryset = queryset.filter(status=status) # Filter by modality modality = self.request.GET.get('modality') if modality: queryset = queryset.filter(modality=modality) # Filter by priority priority = self.request.GET.get('priority') if priority: queryset = queryset.filter(priority=priority) # Filter by date range date_from = self.request.GET.get('date_from') date_to = self.request.GET.get('date_to') if date_from: queryset = queryset.filter(order_datetime__date__gte=date_from) if date_to: queryset = queryset.filter(order_datetime__date__lte=date_to) return queryset.select_related( 'patient', 'ordering_provider' ).order_by('-order_datetime') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'statuses': ImagingOrder._meta.get_field('status').choices, 'modalities': ImagingOrder._meta.get_field('modality').choices, 'priorities': ImagingOrder._meta.get_field('priority').choices, }) return context class ImagingOrderDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about an imaging order. Refactored to use improved managers and fix logic issues. """ model = ImagingOrder template_name = 'radiology/orders/imaging_order_detail.html' context_object_name = 'order' def get_queryset(self): """Use the custom manager for optimized queries.""" return ImagingOrder.objects.with_patient_details().filter( tenant=self.request.user.tenant ) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) imaging_order = self.object # Get studies for this order using optimized manager studies = ImagingStudy.objects.with_related().filter( imaging_order=imaging_order ).order_by('-study_datetime') context['studies'] = studies # Get all reports for studies in this order using optimized manager if studies.exists(): study_ids = list(studies.values_list('id', flat=True)) reports = RadiologyReport.objects.with_study_details().filter( study_id__in=study_ids ).order_by('-created_at') context['reports'] = reports # Create a mapping of study_id to reports for template use reports_by_study = {} for report in reports: study_id = report.study_id if study_id not in reports_by_study: reports_by_study[study_id] = [] reports_by_study[study_id].append(report) context['reports_by_study'] = reports_by_study else: context['reports'] = RadiologyReport.objects.none() context['reports_by_study'] = {} # Add summary statistics context['study_count'] = studies.count() context['completed_studies'] = studies.filter(status='COMPLETED').count() context['pending_reports'] = RadiologyReport.objects.filter( study__in=studies, status='DRAFT' ).count() if studies.exists() else 0 # Add critical findings count context['critical_findings'] = RadiologyReport.objects.filter( study__in=studies, critical_finding=True ).count() if studies.exists() else 0 # Check if order can be modified (business rule) context['can_modify'] = imaging_order.status in ['PENDING', 'SCHEDULED'] # Get available report templates for quick access context['report_templates'] = ReportTemplate.objects.for_modality( imaging_order.modality ).filter( body_part__in=[imaging_order.body_part, 'ALL'] )[:5] # Limit to 5 most relevant templates return context class ImagingOrderCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView): """ Create a new imaging order. """ model = ImagingOrder form_class = ImagingOrderForm template_name = 'radiology/orders/imaging_order_form.html' permission_required = 'radiology.add_imagingorder' success_url = reverse_lazy('radiology:imaging_order_list') def form_valid(self, form): form.instance.tenant = self.request.user.tenant form.instance.ordering_provider = self.request.user form.instance.order_datetime = timezone.now() response = super().form_valid(form) # Log the action AuditLogger.log_action( user=self.request.user, action='IMAGING_ORDER_CREATED', model='ImagingOrder', object_id=str(self.object.order_id), details={ 'patient_name': f"{self.object.patient.first_name} {self.object.patient.last_name}", 'modality': self.object.modality, 'study_description': self.object.study_description, 'priority': self.object.priority } ) messages.success(self.request, 'Imaging order created successfully.') return response class ImagingOrderUpdateView(LoginRequiredMixin, PermissionRequiredMixin, UpdateView): """ Update imaging order (limited to status and notes only). """ model = ImagingOrder fields = ['status', 'notes'] # Restricted fields for clinical orders template_name = 'radiology/orders/imaging_order_form.html' permission_required = 'radiology.change_imagingorder' def get_queryset(self): return ImagingOrder.objects.filter(tenant=self.request.user.tenant) def get_success_url(self): return reverse('radiology:imaging_order_detail', kwargs={'pk': self.object.pk}) def form_valid(self, form): response = super().form_valid(form) # Log the action AuditLogger.log_action( user=self.request.user, action='IMAGING_ORDER_UPDATED', model='ImagingOrder', object_id=str(self.object.order_id), details={ 'patient_name': f"{self.object.patient.first_name} {self.object.patient.last_name}", 'changes': form.changed_data } ) messages.success(self.request, 'Imaging order updated successfully.') return response class ImagingStudyListView(LoginRequiredMixin, ListView): """ List all imaging studies with filtering and search. """ model = ImagingStudy template_name = 'radiology/studies/imaging_study_list.html' context_object_name = 'imaging_studies' paginate_by = 25 def get_queryset(self): queryset = ImagingStudy.objects.filter(tenant=self.request.user.tenant) # Search functionality search = self.request.GET.get('search') if search: queryset = queryset.filter( Q(study_id__icontains=search) | Q(imaging_order__patient__first_name__icontains=search) | Q(imaging_order__patient__last_name__icontains=search) | Q(imaging_order__patient__mrn__icontains=search) ) # Filter by status status = self.request.GET.get('status') if status: queryset = queryset.filter(status=status) # Filter by modality modality = self.request.GET.get('modality') if modality: queryset = queryset.filter(imaging_order__modality=modality) return queryset.select_related('imaging_order__patient').order_by('-study_datetime') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'statuses': ImagingStudy._meta.get_field('status').choices, 'modalities': ImagingOrder._meta.get_field('modality').choices, }) return context class ImagingStudyDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about an imaging study. """ model = ImagingStudy template_name = 'radiology/studies/imaging_study_detail.html' context_object_name = 'study' def get_queryset(self): return ImagingStudy.objects.filter(tenant=self.request.user.tenant) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) imaging_study = self.object # Get series for this study context['series'] = imaging_study.series # Get reports for this study context['reports'] = imaging_study.report # Get total image count context['total_images'] = DICOMImage.objects.filter( series__study=imaging_study, series__study__tenant=self.request.user.tenant ).count() return context class ImagingStudyCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView): """ Create a new imaging study. """ model = ImagingStudy form_class = ImagingStudyForm template_name = 'radiology/studies/imaging_study_form.html' permission_required = 'radiology.add_imagingstudy' success_url = reverse_lazy('radiology:imaging_study_list') def form_valid(self, form): form.instance.tenant = self.request.user.tenant form.instance.technologist = self.request.user response = super().form_valid(form) # Log the action AuditLogger.log_action( user=self.request.user, action='IMAGING_STUDY_CREATED', model='ImagingStudy', object_id=str(self.object.study_id), details={ 'patient_name': f"{self.object.order.patient.first_name} {self.object.order.patient.last_name}", 'modality': self.object.order.modality } ) messages.success(self.request, 'Imaging study created successfully.') return response class ImagingStudyUpdateView(LoginRequiredMixin, PermissionRequiredMixin, UpdateView): """ Update imaging study (limited to status and technical notes). """ model = ImagingStudy fields = ['status', 'technical_notes'] # Restricted fields template_name = 'radiology/studies/imaging_study_form.html' permission_required = 'radiology.change_imagingstudy' def get_queryset(self): return ImagingStudy.objects.filter(tenant=self.request.user.tenant) def get_success_url(self): return reverse('radiology:imaging_study_detail', kwargs={'pk': self.object.pk}) def form_valid(self, form): response = super().form_valid(form) # Log the action AuditLogger.log_action( user=self.request.user, action='IMAGING_STUDY_UPDATED', model='ImagingStudy', object_id=str(self.object.study_id), details={ 'patient_name': f"{self.object.order.patient.first_name} {self.object.order.patient.last_name}", 'changes': form.changed_data } ) messages.success(self.request, 'Imaging study updated successfully.') return response class ImagingSeriesListView(LoginRequiredMixin, ListView): """ List all imaging series with filtering and search. """ model = ImagingSeries template_name = 'radiology/series/imaging_series_list.html' context_object_name = 'series' paginate_by = 25 def get_queryset(self): queryset = ImagingSeries.objects.filter(tenant=self.request.user.tenant) # Filter by study study_id = self.request.GET.get('study') if study_id: queryset = queryset.filter(study_id=study_id) # Search functionality search = self.request.GET.get('search') if search: queryset = queryset.filter( Q(series_description__icontains=search) | Q(study__imaging_order__patient__first_name__icontains=search) | Q(study__imaging_order__patient__last_name__icontains=search) ) return queryset.select_related('study__imaging_order__patient').order_by('-created_at') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'studies': ImagingStudy.objects.filter( tenant=self.request.user.tenant ).select_related('imaging_order__patient').order_by('-study_datetime')[:50], }) return context class ImagingSeriesDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about an imaging series. """ model = ImagingSeries template_name = 'radiology/series/imaging_series_detail.html' context_object_name = 'series' def get_queryset(self): return ImagingSeries.objects.filter(study__tenant=self.request.user.tenant) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) imaging_series = self.object # Get images for this series context['images'] = imaging_series.images.all().order_by('instance_number') return context class ImagingSeriesCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView): """ Create a new imaging series. """ model = ImagingSeries form_class = ImagingSeriesForm template_name = 'radiology/series/imaging_series_form.html' permission_required = 'radiology.add_imagingseries' success_url = reverse_lazy('radiology:imaging_series_list') def form_valid(self, form): form.instance.tenant = self.request.user.tenant response = super().form_valid(form) # Log the action AuditLogger.log_action( user=self.request.user, action='IMAGING_SERIES_CREATED', model='ImagingSeries', object_id=str(self.object.series_id), details={ 'series_description': self.object.series_description, 'study_id': str(self.object.study.study_id) } ) messages.success(self.request, 'Imaging series created successfully.') return response class DICOMImageListView(LoginRequiredMixin, ListView): """ List all DICOM images with filtering and search. """ model = DICOMImage template_name = 'radiology/dicom/dicom_file_list.html' context_object_name = 'dicom_images' paginate_by = 50 def get_queryset(self): queryset = DICOMImage.objects.filter(series__study__tenant=self.request.user.tenant) # Filter by series series_id = self.request.GET.get('series') if series_id: queryset = queryset.filter(series_id=series_id) # Filter by study study_id = self.request.GET.get('study') if study_id: queryset = queryset.filter(series__study_id=study_id) return queryset.select_related('series__study__imaging_order__patient').order_by('instance_number') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'series': ImagingSeries.objects.filter( study__tenant=self.request.user.tenant ).select_related('study__order__patient').order_by('-created_at')[:50], }) return context class DICOMImageDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about a DICOM image. """ model = DICOMImage template_name = 'radiology/dicom_image_detail.html' context_object_name = 'dicom_image' def get_queryset(self): return DICOMImage.objects.filter(tenant=self.request.user.tenant) class RadiologyReportListView(LoginRequiredMixin, ListView): """ List all radiology reports with filtering and search. """ model = RadiologyReport template_name = 'radiology/reports/radiology_report_list.html' context_object_name = 'radiology_reports' paginate_by = 25 def get_queryset(self): queryset = RadiologyReport.objects.filter(study__tenant=self.request.user.tenant) # Search functionality search = self.request.GET.get('search') if search: queryset = queryset.filter( Q(study__order__patient__first_name__icontains=search) | Q(study__order__patient__last_name__icontains=search) | Q(study__order__patient__mrn__icontains=search) | Q(findings__icontains=search) | Q(impression__icontains=search) ) # Filter by status status = self.request.GET.get('status') if status: queryset = queryset.filter(status=status) # Filter by critical findings critical_only = self.request.GET.get('critical_only') if critical_only: queryset = queryset.filter(critical_finding=True) # Filter by radiologist radiologist_id = self.request.GET.get('radiologist') if radiologist_id: queryset = queryset.filter(radiologist_id=radiologist_id) return queryset.select_related( 'study__imaging_order__patient', 'radiologist', 'template_used' ).order_by('-created_at') def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context.update({ 'statuses': RadiologyReport._meta.get_field('status').choices, }) return context class RadiologyReportDetailView(LoginRequiredMixin, DetailView): """ Display detailed information about a radiology report. """ model = RadiologyReport template_name = 'radiology/reports/radiology_report_detail.html' context_object_name = 'report' def get_queryset(self): return RadiologyReport.objects.filter(study__tenant=self.request.user.tenant) class RadiologyReportCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView): """ Create a new radiology report. """ model = RadiologyReport form_class = RadiologyReportForm template_name = 'radiology/reports/radiology_report_form.html' permission_required = 'radiology.add_radiologyreport' success_url = reverse_lazy('radiology:radiology_report_list') def form_valid(self, form): form.instance.tenant = self.request.user.tenant form.instance.radiologist = self.request.user response = super().form_valid(form) # Log the action AuditLogger.log_event( user=self.request.user, action='RADIOLOGY_REPORT_CREATED', model='RadiologyReport', object_id=str(self.object.report_id), details={ 'patient_name': f"{self.object.study.order.patient.first_name} {self.object.study.order.patient.last_name}", 'critical_finding': self.object.critical_finding } ) messages.success(self.request, 'Radiology report created successfully.') return response @login_required def radiology_stats(request): """ HTMX endpoint for radiology statistics. """ tenant = request.user.tenant today = timezone.now().date() stats = { 'pending_orders': ImagingOrder.objects.filter( tenant=tenant, status='PENDING' ).count(), 'scheduled_studies': ImagingStudy.objects.filter( tenant=tenant, status='SCHEDULED' ).count(), 'in_progress_studies': ImagingStudy.objects.filter( tenant=tenant, status='IN_PROGRESS' ).count(), 'reports_pending': RadiologyReport.objects.filter( study__tenant=tenant, status='DRAFT' ).count(), 'critical_findings': RadiologyReport.objects.filter( study__tenant=tenant, critical_finding=True, status='SIGNED', finalized_datetime__date=today ).count(), } return render(request, 'radiology/partials/radiology_stats.html', {'stats': stats}) @login_required def order_search(request): """ HTMX endpoint for imaging order search. """ search = request.GET.get('search', '') status = request.GET.get('status', '') modality = request.GET.get('modality', '') queryset = ImagingOrder.objects.filter(tenant=request.user.tenant) if search: queryset = queryset.filter( Q(patient__first_name__icontains=search) | Q(patient__last_name__icontains=search) | Q(patient__mrn__icontains=search) | Q(study_description__icontains=search) ) if status: queryset = queryset.filter(status=status) if modality: queryset = queryset.filter(modality=modality) orders = queryset.select_related( 'patient', 'ordering_provider' ).order_by('-order_datetime')[:20] return render(request, 'radiology/partials/order_list.html', {'orders': orders}) @login_required def schedule_study(request, order_id): """ Schedule an imaging study for an order. """ if request.method == 'POST': order = get_object_or_404( ImagingOrder, id=order_id, tenant=request.user.tenant ) scheduled_datetime = request.POST.get('scheduled_datetime') if scheduled_datetime: scheduled_datetime = timezone.datetime.fromisoformat(scheduled_datetime) # Create or update study study, created = ImagingStudy.objects.get_or_create( order=order, tenant=request.user.tenant, defaults={ 'study_datetime': scheduled_datetime, 'status': 'SCHEDULED', 'technologist': request.user } ) if not created: study.study_datetime = scheduled_datetime study.status = 'SCHEDULED' study.save() # Update order status order.status = 'SCHEDULED' order.save() # Log the action AuditLogger.log_action( user=request.user, action='STUDY_SCHEDULED', model='ImagingOrder', object_id=str(order.order_id), details={ 'patient_name': f"{order.patient.first_name} {order.patient.last_name}", 'scheduled_time': scheduled_datetime.isoformat() } ) messages.success(request, 'Study scheduled successfully.') if request.headers.get('HX-Request'): return render(request, 'radiology/partials/order_status.html', {'order': order}) return redirect('radiology:imaging_order_detail', pk=order.pk) return JsonResponse({'success': False}) @login_required def start_study(request, study_id): """ Start an imaging study. """ if request.method == 'POST': study = get_object_or_404( ImagingStudy, id=study_id, tenant=request.user.tenant ) study.status = 'IN_PROGRESS' study.started_datetime = timezone.now() study.technologist = request.user study.save() # Update order status study.order.status = 'IN_PROGRESS' study.order.save() # Log the action AuditLogger.log_action( user=request.user, action='STUDY_STARTED', model='ImagingStudy', object_id=str(study.study_id), details={ 'patient_name': f"{study.order.patient.first_name} {study.order.patient.last_name}", 'modality': study.order.modality } ) messages.success(request, 'Study started successfully.') if request.headers.get('HX-Request'): return render(request, 'radiology/partials/study_status.html', {'study': study}) return redirect('radiology:imaging_study_detail', pk=study.pk) return JsonResponse({'success': False}) @login_required def complete_study(request, study_id): """ Complete an imaging study. """ if request.method == 'POST': study = get_object_or_404( ImagingStudy, id=study_id, tenant=request.user.tenant ) study.status = 'COMPLETED' study.completed_datetime = timezone.now() study.save() # Update order status study.order.status = 'COMPLETED' study.order.save() # Log the action AuditLogger.log_action( user=request.user, action='STUDY_COMPLETED', model='ImagingStudy', object_id=str(study.study_id), details={ 'patient_name': f"{study.order.patient.first_name} {study.order.patient.last_name}", 'modality': study.order.modality } ) messages.success(request, 'Study completed successfully.') if request.headers.get('HX-Request'): return render(request, 'radiology/partials/study_status.html', {'study': study}) return redirect('radiology:imaging_study_detail', pk=study.pk) return JsonResponse({'success': False}) @login_required def sign_report(request, report_id): """ Sign a radiology report. """ if request.method == 'POST': report = get_object_or_404( RadiologyReport, id=report_id, tenant=request.user.tenant ) # Only allow signing if report is in draft status if report.status != 'DRAFT': messages.error(request, 'Only draft reports can be signed.') return redirect('radiology:radiology_report_detail', pk=report.pk) report.status = 'SIGNED' report.signed_datetime = timezone.now() report.signed_by = request.user report.save() # Log the action AuditLogger.log_action( user=request.user, action='REPORT_SIGNED', model='RadiologyReport', object_id=str(report.report_id), details={ 'patient_name': f"{report.study.order.patient.first_name} {report.study.order.patient.last_name}", 'critical_finding': report.critical_finding } ) messages.success(request, 'Report signed successfully.') if request.headers.get('HX-Request'): return render(request, 'radiology/partials/report_status.html', {'report': report}) return redirect('radiology:radiology_report_detail', pk=report.pk) return JsonResponse({'success': False}) # DICOM Image Viewing Views class DICOMImageViewerView(LoginRequiredMixin, DetailView): """ DICOM image viewer with basic viewing capabilities. """ model = DICOMImage template_name = 'radiology/dicom/dicom_viewer.html' context_object_name = 'dicom_image' def get_queryset(self): return DICOMImage.objects.filter(series__study__tenant=self.request.user.tenant) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) dicom_image = self.object # Get all images in the same series for navigation series_images = DICOMImage.objects.filter( series=dicom_image.series ).order_by('instance_number') context['series_images'] = series_images context['current_index'] = list(series_images).index(dicom_image) context['total_images'] = series_images.count() # Get previous and next images current_index = context['current_index'] if current_index > 0: context['previous_image'] = series_images[current_index - 1] if current_index < context['total_images'] - 1: context['next_image'] = series_images[current_index + 1] # Get DICOM metadata if file exists if dicom_image.has_dicom_file(): context['dicom_metadata'] = dicom_image.get_dicom_metadata() return context class DICOMSeriesViewerView(LoginRequiredMixin, DetailView): """ DICOM series viewer showing all images in a series. """ model = ImagingSeries template_name = 'radiology/dicom/series_viewer.html' context_object_name = 'series' def get_queryset(self): return ImagingSeries.objects.filter(study__tenant=self.request.user.tenant) def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) series = self.object # Get all images in this series images = DICOMImage.objects.filter( series=series ).order_by('instance_number') context['images'] = images context['image_count'] = images.count() # Get first image for initial display if images.exists(): context['first_image'] = images.first() return context @login_required def dicom_image_file(request, image_id): """ Serve DICOM image file for viewing. """ dicom_image = get_object_or_404( DICOMImage, image_id=image_id, series__study__tenant=request.user.tenant ) if not dicom_image.has_dicom_file(): raise Http404("DICOM file not found") # Log access for audit AuditLogger.log_event( user=request.user, action='DICOM_IMAGE_ACCESSED', model='DICOMImage', object_id=str(dicom_image.image_id), details={ 'patient_name': f"{dicom_image.patient.first_name} {dicom_image.patient.last_name}", 'sop_instance_uid': dicom_image.sop_instance_uid } ) # Serve the file try: response = FileResponse( open(dicom_image.file_path, 'rb'), content_type='application/dicom' ) response['Content-Disposition'] = f'inline; filename="{dicom_image.sop_instance_uid}.dcm"' return response except FileNotFoundError: raise Http404("DICOM file not found on disk") @login_required def dicom_image_thumbnail(request, image_id): """ Generate and serve thumbnail for DICOM image. """ dicom_image = get_object_or_404( DICOMImage, image_id=image_id, series__study__tenant=request.user.tenant ) if not dicom_image.has_dicom_file(): raise Http404("DICOM file not found") try: from pydicom import dcmread import io from PIL import Image # Read DICOM file ds = dcmread(dicom_image.file_path) # Get pixel data pixel_array = ds.pixel_array # Normalize to 8-bit for thumbnail if pixel_array.dtype != np.uint8: # Apply window/level if available if hasattr(ds, 'WindowCenter') and hasattr(ds, 'WindowWidth'): window_center = float(ds.WindowCenter) window_width = float(ds.WindowWidth) # Apply windowing img_min = window_center - window_width // 2 img_max = window_center + window_width // 2 pixel_array = np.clip(pixel_array, img_min, img_max) # Normalize to 0-255 pixel_array = ((pixel_array - img_min) / (img_max - img_min) * 255).astype(np.uint8) else: # Simple normalization pixel_array = ((pixel_array - pixel_array.min()) / (pixel_array.max() - pixel_array.min()) * 255).astype(np.uint8) # Create PIL Image pil_image = Image.fromarray(pixel_array) # Create thumbnail thumbnail_size = (200, 200) pil_image.thumbnail(thumbnail_size, Image.Resampling.LANCZOS) # Save to bytes img_io = io.BytesIO() pil_image.save(img_io, format='PNG') img_io.seek(0) response = HttpResponse(img_io.getvalue(), content_type='image/png') response['Cache-Control'] = 'max-age=3600' # Cache for 1 hour return response except Exception as e: # Return a placeholder image or error raise Http404(f"Could not generate thumbnail: {str(e)}") @login_required def dicom_image_preview(request, image_id): """ Generate and serve preview image for DICOM. """ dicom_image = get_object_or_404( DICOMImage, image_id=image_id, series__study__tenant=request.user.tenant ) if not dicom_image.has_dicom_file(): raise Http404("DICOM file not found") try: from pydicom import dcmread import io from PIL import Image # Read DICOM file ds = dcmread(dicom_image.file_path) # Get pixel data pixel_array = ds.pixel_array # Normalize to 8-bit for preview if pixel_array.dtype != np.uint8: # Apply window/level if available if hasattr(ds, 'WindowCenter') and hasattr(ds, 'WindowWidth'): window_center = float(ds.WindowCenter) window_width = float(ds.WindowWidth) # Apply windowing img_min = window_center - window_width // 2 img_max = window_center + window_width // 2 pixel_array = np.clip(pixel_array, img_min, img_max) # Normalize to 0-255 pixel_array = ((pixel_array - img_min) / (img_max - img_min) * 255).astype(np.uint8) else: # Simple normalization pixel_array = ((pixel_array - pixel_array.min()) / (pixel_array.max() - pixel_array.min()) * 255).astype(np.uint8) # Create PIL Image pil_image = Image.fromarray(pixel_array) # Resize for preview (max 800x800) max_size = (800, 800) pil_image.thumbnail(max_size, Image.Resampling.LANCZOS) # Save to bytes img_io = io.BytesIO() pil_image.save(img_io, format='PNG') img_io.seek(0) response = HttpResponse(img_io.getvalue(), content_type='image/png') response['Cache-Control'] = 'max-age=1800' # Cache for 30 minutes return response except Exception as e: # Return a placeholder image or error raise Http404(f"Could not generate preview: {str(e)}") @login_required def dicom_metadata_json(request, image_id): """ Return DICOM metadata as JSON. """ dicom_image = get_object_or_404( DICOMImage, image_id=image_id, series__study__tenant=request.user.tenant ) if not dicom_image.has_dicom_file(): return JsonResponse({'error': 'DICOM file not found'}, status=404) try: from pydicom import dcmread # Read DICOM file ds = dcmread(dicom_image.file_path) # Extract key metadata metadata = { 'patient_name': str(ds.get('PatientName', '')), 'patient_id': str(ds.get('PatientID', '')), 'study_date': str(ds.get('StudyDate', '')), 'study_time': str(ds.get('StudyTime', '')), 'modality': str(ds.get('Modality', '')), 'study_description': str(ds.get('StudyDescription', '')), 'series_description': str(ds.get('SeriesDescription', '')), 'instance_number': str(ds.get('InstanceNumber', '')), 'rows': int(ds.get('Rows', 0)), 'columns': int(ds.get('Columns', 0)), 'bits_allocated': int(ds.get('BitsAllocated', 0)), 'bits_stored': int(ds.get('BitsStored', 0)), 'pixel_spacing': str(ds.get('PixelSpacing', '')), 'slice_thickness': str(ds.get('SliceThickness', '')), 'window_center': str(ds.get('WindowCenter', '')), 'window_width': str(ds.get('WindowWidth', '')), 'manufacturer': str(ds.get('Manufacturer', '')), 'model_name': str(ds.get('ManufacturerModelName', '')), 'sop_instance_uid': str(ds.get('SOPInstanceUID', '')), 'study_instance_uid': str(ds.get('StudyInstanceUID', '')), 'series_instance_uid': str(ds.get('SeriesInstanceUID', '')), } return JsonResponse(metadata) except Exception as e: return JsonResponse({'error': f'Could not read DICOM metadata: {str(e)}'}, status=500) @login_required def series_images_json(request, series_id): """ Return list of images in a series as JSON for viewer navigation. """ series = get_object_or_404( ImagingSeries, series_id=series_id, study__tenant=request.user.tenant ) images = DICOMImage.objects.filter( series=series ).order_by('instance_number') images_data = [] for image in images: images_data.append({ 'id': str(image.image_id), 'instance_number': image.instance_number, 'sop_instance_uid': image.sop_instance_uid, 'has_file': image.has_dicom_file(), 'file_size_mb': image.file_size_mb, 'thumbnail_url': reverse('radiology:dicom_image_thumbnail', kwargs={'image_id': image.image_id}), 'preview_url': reverse('radiology:dicom_image_preview', kwargs={'image_id': image.image_id}), 'viewer_url': reverse('radiology:dicom_image_viewer', kwargs={'pk': image.pk}), }) return JsonResponse({ 'series_id': str(series.series_id), 'series_description': series.series_description, 'modality': series.modality, 'image_count': len(images_data), 'images': images_data }) @login_required def study_series_json(request, study_id): """ Return list of series in a study as JSON. """ study = get_object_or_404( ImagingStudy, study_id=study_id, tenant=request.user.tenant ) series_list = ImagingSeries.objects.filter( study=study ).order_by('series_number') series_data = [] for series in series_list: image_count = DICOMImage.objects.filter(series=series).count() series_data.append({ 'id': str(series.series_id), 'series_number': series.series_number, 'series_description': series.series_description, 'modality': series.modality, 'image_count': image_count, 'viewer_url': reverse('radiology:dicom_series_viewer', kwargs={'pk': series.pk}), }) return JsonResponse({ 'study_id': str(study.study_id), 'study_description': study.study_description, 'accession_number': study.accession_number, 'series_count': len(series_data), 'series': series_data }) @login_required def dictate_report(request, study_id): """ Start dictating a report for a study. """ if request.method == 'POST': study = get_object_or_404( ImagingStudy, id=study_id, tenant=request.user.tenant ) template_id = request.POST.get('template_id') template = None if template_id: template = get_object_or_404( ReportTemplate, id=template_id, tenant=request.user.tenant ) # Create report if it doesn't exist report, created = RadiologyReport.objects.get_or_create( study=study, tenant=request.user.tenant, defaults={ 'radiologist': request.user, 'template': template, 'status': 'DRAFT' } ) if created: # Log the action AuditLogger.log_action( user=request.user, action='REPORT_DICTATION_STARTED', model='RadiologyReport', object_id=str(report.report_id), details={ 'patient_name': f"{study.order.patient.first_name} {study.order.patient.last_name}", 'template_used': template.template_name if template else None } ) messages.success(request, 'Report dictation started.') return redirect('radiology:radiology_report_detail', pk=report.pk) return JsonResponse({'success': False})