feat(tasks): Refactor series_reconstruct_task and add _stamp_derived_dataset for improved dataset handling

atlas/tasks.py

@@ -86,7 +86,6 @@ from generic.models import CimarCase
 from rad.settings import REMOTE_URL, CIMAR_USERNAME, CIMAR_PASSWORD
 from helpers.cimar import CimarAPI, NotFoundError
 from pydicom.uid import generate_uid
-from datetime import datetime
 from django.contrib.auth.models import User
 from django.core.files.base import ContentFile
 from django.core.cache import cache
@@ -392,9 +391,6 @@ def series_reconstruct_task(
         recon_series = atlas_views._create_series_derivative(series, f"Recon {plane_norm.title()} ({source_plane.title()} src)")
         recon_series.series_instance_uid = generate_uid()
         recon_series.save(update_fields=["series_instance_uid"])
-        now = datetime.utcnow()
-        date_str = now.strftime("%Y%m%d")
-        time_str = now.strftime("%H%M%S.%f")[:13]
 
         for idx in range(int(cfg["count"])):
             arr2d = cfg["slice_fn"](idx)
@@ -404,18 +400,16 @@ def series_reconstruct_task(
             ds_new.Rows = int(arr2d.shape[0])
             ds_new.Columns = int(arr2d.shape[1])
             ds_new.InstanceNumber = idx + 1
-            ds_new.SOPInstanceUID = generate_uid()
-            ds_new.SeriesInstanceUID = recon_series.series_instance_uid
-            ds_new.SeriesDescription = recon_series.description or f"Recon {plane_norm.title()}"
-            ds_new.ImageType = ["DERIVED", "SECONDARY", "MPR"]
-            ds_new.DerivationDescription = (
+            atlas_views._stamp_derived_dataset(
+                ds_new,
+                series_instance_uid=recon_series.series_instance_uid,
+                series_description=recon_series.description or f"Recon {plane_norm.title()}",
+                derivation_description=(
                 f"{plane_norm.title()} reconstruction; mode={recon_thickness_mode}; "
                 f"thickness={float(cfg['slice_thickness_out']):.3f}mm; spacing={float(cfg['spacing_between_slices_out']):.3f}mm"
+                ),
+                image_type=["DERIVED", "SECONDARY", "MPR"],
             )
-            ds_new.ContentDate = date_str
-            ds_new.ContentTime = time_str
-            ds_new.InstanceCreationDate = date_str
-            ds_new.InstanceCreationTime = time_str
             ds_new.PixelData = arr2d.tobytes()
             ds_new.PixelSpacing = [float(cfg["pixel_spacing_out"][0]), float(cfg["pixel_spacing_out"][1])]
             ds_new.ImageOrientationPatient = cfg["image_orientation_out"]