improve suggest answers (and fix some other issues)

generic/models.py

@@ -37,6 +37,7 @@ from easy_thumbnails.exceptions import InvalidImageFormatError
 
 
 import pydicom
+import pydicom.errors
 import dicognito.anonymizer
 from django.contrib.auth.models import User
 from django.forms.models import model_to_dict
@@ -240,6 +241,24 @@ class SeriesImageBase(models.Model):
         ordering = ["position"]
         abstract = True
 
+    def get_file_size(self):
+        try:
+            return self.image.size
+
+        # We catch this for when the image does not exist
+        except FileNotFoundError:
+            return 0
+
+    def get_dicom_data(self):
+        try:
+            with pydicom.dcmread(self.image) as d:
+                return d
+        except pydicom.errors.InvalidDicomError:
+            return {}
+
+    def get_series(self):
+        return self.series
+
     def get_dicom_json(self):
         try:
             json = pydicom.read_file(self.image).to_json()