Freeman, L M Ultrasound versus radionuclide imaging in the evaluation of patients with acute right-upper-quadrant pain. [electronic resource] - Radiology Apr 1982 - 280-2 p. digital Publication Type: Comparative Study; Letter ISSN: 0033-8419 Standard No.: 10.1148/radiology.143.1.7063746 doi Subjects--Topical Terms: Cholecystitis--diagnosisCholelithiasis--diagnosisHumansRadionuclide ImagingUltrasonography