Which imaging modality uses multiple views to create cross-sectional images of the body?

• A. Computed Tomography
• B. Magnetic Resonance Imaging
• C. Ultrasound
• D. X-ray Radiography

Answer: (A)

The key idea is creating cross-sectional images by collecting data from many viewpoints around the body. In computed tomography, an X-ray source rotates around the patient while detectors capture transmitted radiation from numerous angles. The resulting projections are processed with reconstruction algorithms to produce axial cross-sectional images (slices) that reveal internal structures in a thin section. These slices can be reformatted into other planes for a fuller view. This angular data collection and slice reconstruction is what sets CT apart from other modalities: plain X-ray radiography gives a single 2D projection; ultrasound builds images from reflected sound waves; MRI uses magnetic fields and radiofrequency signals to generate images without relying on rotating X-ray views.