HIDA scan is useful in:
HIDA Scan: 99mTc hepatobiliary imaging (using iminodiacetic acid compounds), also known as the HIDA scan. is useful in demonstrating an obstructed cystic duct, which is the cause of acute cholecystitis in most patients.
Acute cholecystitis
Meckel's diveiculum
Colonic angio-dysplasia
Diveiculitis
Misc.