The small intestine and colon.
J B
JB
Stubbs
D003106:Colon / Q000000981:diagnostic imaging*; D005260:Female; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D007421:Intestine, Small / Q000000981:diagnostic imaging*; D008297:Male; D011829:Radiation Dosage; D011877:Radionuclide Imaging