Imaging such as CT, MRI, and Sonography require cross-sectional viewing. Which set includes all of these modalities?

• A. CT only
• B. CT, MRI, and Sonography
• C. MRI only
• D. Sonography only

Answer: (B)

Cross-sectional viewing means seeing anatomy in slices through the body rather than as a single projection. CT and MRI inherently produce these cross-sectional images in axial, sagittal, or coronal planes. Ultrasound also provides cross-sectional views in real-time 2D slices along the imaging plane, and with volume techniques can offer multiple planes as well. Because each of these three modalities can render cross-sectional images, the set that includes all of them is the correct choice. The other options would omit one or more modalities, so they don’t encompass all cross-sectional imaging options.