What anatomical structures are well seen with MRI  

MRI provides excellent soft tissue contrast and can readily demonstrate and differentiate adjacent soft tissue structures, far superior to that possible with CT.

Everything is so beautifully seen on MRI that it is easier to discuss what isn't well seen. Air does not give off an MRI signal and produces a void on MRI, thus air containing structures such as the lung appear black. Likewise, MRI of the bowel is limited due to the presence of intestinal gas. Bowel peristalsis also causes motion artifact, limiting the utility of MRI in the evaluation of the bowel.