Magnetic resonance imaging (MRI) uses strong magnetic fields and radio waves to make images of your body. If you are allergic to contrast dye, MRI may be an alternative to CT to look for cancer spreading.
MRI images are particularly useful in showing if cancer has spread outside of the related organs into nearby tissues or lymph nodes. In various cancers, it is used to measure tumour size and depth in the pelvis. A special MRI of the kidneys, ureters, and bladder, known as an MRI urogram, can be used to look at the upper part of the urinary system in patients who cannot tolerate intravenous dye (contrast agent).
Patients with poor kidney function are not good candidates for MRI with contrast agent.
This examination is not suitable for patients with metal implants, artificial joints, screws and pace-makers.