.

rapids/models.py

@@ -29,6 +29,11 @@ import reversion
 
 import json
 
+import hashlib
+
+import pydicom
+import pydicom.errors
+
 image_storage = FileSystemStorage(
     # Physical file location ROOT
     location=u"{0}".format(settings.MEDIA_ROOT),
@@ -432,6 +437,10 @@ class RapidImage(models.Model):
 
     feedback_image = models.BooleanField(default=False)
 
+    image_md5_hash = models.CharField(max_length=32, null=True)
+
+    is_dicom = models.BooleanField(default=False)
+
     def image_tag(self):
         if self.image:
             return mark_safe(
@@ -442,6 +451,19 @@ class RapidImage(models.Model):
 
     image_tag.short_description = 'Image'
 
+    def save(self, *args, **kwargs):
+        """Override save method to add image hash"""
+        if self.image:
+            # Try and read the file as a dicom
+            try:
+                hash = ",".join(pydicom.dcmread(self.image).pixel_array.tostring())
+                self.is_dicom = True
+            except pydicom.errors.InvalidImageFormatError:
+                hash = hashlib.md5(self.image).hexdigest()
+
+            self.image_md5_hash = hash
+        super().save(*args, **kwargs)  # Call the "real" save() method.
+
 
 class RapidCreationDefault(models.Model):
     #author = models.OneToOneField(User,