fix typo

app.py

@@ -74,7 +74,7 @@ def predict(Radiograph):
 
     if view in {0, 1}:
         ctr = calculate_ctr(info_mask.cpu().numpy())
-        info_string += f"\nThe estimated cardiothoracic radio (CTR) is {ctr:0.2f}."
+        info_string += f"\nThe estimated cardiothoracic ratio (CTR) is {ctr:0.2f}."
         if view == 0:
             info_string += (
                 "\nNote that the cardiac silhuoette is magnified in the AP projection."