add the ablitiy to truncate series on the site

atlas/models.py

@@ -466,7 +466,7 @@ def extract_image_dicom_json_from_ds(ds, url, image_index):
 
 
 class SeriesImage(SeriesImageBase):
-    image = models.FileField(upload_to=image_directory_path)
+    image = models.FileField(upload_to=image_directory_path, null=True)
     series = models.ForeignKey(
         "Series", related_name="images", on_delete=models.CASCADE, null=True
     )
@@ -479,11 +479,6 @@ class SeriesImage(SeriesImageBase):
         help_text="Reference to the object that has replaced this one.",
     )
 
-    removed = models.BooleanField(
-        default=False,
-        help_text="Set to true if the file this object refers to has been removed (either from series truncation or merging)",
-    )
-
     def get_dicom_data(self):
         try:
             with pydicom.dcmread(self.image) as d:
@@ -563,15 +558,6 @@ class Series(SeriesBase):
         related_name="series",
     )
 
-
-    class SeriesModifiedChocies(models.TextChoices):
-        NO = "NO", "Not modified",
-        TR = "TR", "Truncated",
-        RE = "RE", "Resliced/resampled",
-
-
-    modified = models.CharField(max_length=2, default=SeriesModifiedChocies.NO, choices=SeriesModifiedChocies.choices)
-
     series_instance_uid = models.CharField(max_length=255, blank=True, null=True)
 
     # findings = models.TextField(null=True, blank=True, help_text="Findings on the series / stack")
@@ -603,7 +589,7 @@ class Series(SeriesBase):
 
         # TODO: clean up (this is rather convoluted....)
         image: SeriesImage
-        for series_n, image in enumerate(self.images.all()):
+        for series_n, image in enumerate(self.images.filter(removed=False)):
             ds = image.get_dicom_data()
             if series_n == 0:
                 for tag in to_keep: