Add get_full_url method to SeriesImageBase and update DICOM template to use it

generic/models.py

@@ -326,6 +326,9 @@ class SeriesImageBase(models.Model):
         except pydicom.errors.InvalidDicomError:
             return {}
 
+    def get_full_url(self):
+        return f"{REMOTE_URL}{self.image.url}"
+
     def get_series(self):
         return self.series