... palpation (feel), percussion (tap to determine resonance
characteristics), and auscultation (listen); ... , ultrasonography , and nuclear magnetic resonance
... ultrasound, radioisotopes, and MRI (Magnetic resonance
Imaging). A newer branch of radiology, ...
... Patent 2246369 Surgical procedure with magnetic resonance
US Patent 5,735,278 (at USPTO) Surgical procedure with magnetic resonance
US Patent 5,735,278 (at Google) Surgical procedure with magnetic resonance
Diffuse optical imaging
Diffusion tensor imaging
Functional magnetic resonance
... to remove the polyps. 
Other types of scans include Heart , Brain , Bone density , Angiogram , Carotid artery .  
imaging (MRI) scans are associated with a lesser radiation risk than CT scans, and are being evaluated for their use in screening. 
... Brammer, M. J., Williams, S., Murray, R.M., & McGuire, P.K. (2000). Mapping auditory hallucinations in schizophrenia using functional magnetic resonance
imaging. Archives of General Psychiatry, 57, 1033 -1038.
Singer, H.S. (1997). Neurobiology of Tourette syndrome. Neurologic Clinics, 15, 357–379.