Which imaging modalities map a region of tissue?

• A. MRI, CT, and Fluoro
• B. MRI and CT
• C. Fluoro only
• D. Ultrasound

Answer: (A)

Imaging modalities that map a region of tissue are those that produce a spatial representation of tissue across a defined area, showing where structures are and how they relate to one another. MRI and CT do this by creating detailed anatomical maps: MRI uses differences in tissue properties to highlight soft tissues and fluids, while CT measures X-ray attenuation to map tissue density across slices of the region. Fluoroscopy adds a real-time map, streaming images as anatomy or contrast moves, so you can see dynamics within the region being examined.

Ultrasound does map tissue as well, but its images are highly operator-dependent and have a more limited, variable field of view, which makes it less consistent for comprehensive region-wide mapping compared with MRI, CT, or fluoroscopy.