The upper abdomen is above the belly button and below the rib cage, containing the stomach, liver, gallbladder, pancreas, and spleen.
The lower abdomen is located below the belly button and above the pubic bone and contains the small intestine, colon, rectum, and bladder.
MRI provides better soft tissue contrast and is considered to be the more versatile and sensitive imaging modality, while CT is faster and more widely available.
Learn More About MRI Abdomen on bookmerilab.com