.

longs/models.py

@@ -32,6 +32,8 @@ from generic.models import Examination, Condition, Sign, ExamBase, Plane, Contra
 from easy_thumbnails.files import get_thumbnailer
 from easy_thumbnails.exceptions import InvalidImageFormatError
 
+import pydicom
+
 
 
 image_storage = FileSystemStorage(
@@ -283,6 +285,39 @@ class LongSeries(models.Model):
             "<div>{}<br/>{}<br/>Images: {}</div>", examination, thumb, image_number
         )
 
+    def order_by_dicom_location(self):
+        images = self.images.all()
+
+        files = []
+
+        for i in images:
+            files.append((i, pydicom.dcmread(i.image.path)))
+
+        #print("file count: {}".format(len(files)))
+
+        # skip files with no SliceLocation (eg scout views)
+        slices = []
+        map = {}
+        skipcount = 0
+        for i, f in files:
+            if hasattr(f, 'SliceLocation'):
+                slices.append(f)
+                map[f.SliceLocation] = i
+            else:
+                skipcount = skipcount + 1
+
+        print("skipped, no SliceLocation: {}".format(skipcount))
+
+        # ensure they are in the correct order
+        slices = sorted(slices, key=lambda s: s.SliceLocation)
+
+        #print(slices)
+        n = 1
+        for f in slices:
+            i = map[f.SliceLocation]
+            i.position = n
+            i.save()
+            n = n + 1
 
 # class LongImage(models.Model):
 #    long = models.ForeignKey(Long,