A CT scan combines multiple X-ray images to create a cross-sectional view of the body. Which imaging modality is this?

A CT scan combines multiple X-ray images to create a cross-sectional view of the body. Which imaging modality is this?

• A. CT scan
• B. Magnetic resonance imaging
• C. Radiography
• D. Ultrasound

Answer: (A)

Computed tomography constructs cross‑sectional images by combining many X‑ray projections around the body. That rotating, data-collection and reconstruction process is what creates detailed slices, which is exactly what the description in the question is referring to. The other modalities work differently: plain radiography provides a single 2D image, MRI relies on magnetic fields and radio waves to image soft tissues without ionizing radiation, and ultrasound uses sound waves to generate images. So the imaging modality described is computed tomography.

Computed tomography constructs cross‑sectional images by combining many X‑ray projections around the body. That rotating, data-collection and reconstruction process is what creates detailed slices, which is exactly what the description in the question is referring to. The other modalities work differently: plain radiography provides a single 2D image, MRI relies on magnetic fields and radio waves to image soft tissues without ionizing radiation, and ultrasound uses sound waves to generate images. So the imaging modality described is computed tomography.