Radiographic Factors
Diluted Barium Studies (90 KvP):

e.g. Small bowel enema, retrograde ileostomy, pouchogram (distal loop ileostomy opening), perforated esophagus (following Hypaque 30% and no obvious perforation), single contrast barium enema, barium enema via colostomy.
 

Undiluted Barium Studies (100 KvP):

e.g. Barium swallow (esophagogram), upper GI series, air contrast barium enema, small bowel follow through.
 

Hypaque 30% Studies (80 KvP):

e.g. Hypaque swallow (possible perforated esophagus), single contrast colon enema (suspected perforation), pouchogram, sonogram, fistulogram, T-tube cholangiogram.