Computed tomography (CT) is used to view internal body structures. Which option describes this modality best?

• A. Use of CT scan to view internal body structures and planes
• B. Use of ultrasound to view internal body structures
• C. Use of X-ray to view bone density
• D. Use of magnetic resonance for motion imaging

Answer: (A)

CT uses X-ray data rotated around the patient and a computer to reconstruct cross‑sectional images. These thin slices can be viewed in multiple planes—axial, coronal, and sagittal—so you can see internal structures in their exact spatial relationships. That ability to image internal anatomy in different planes is what makes CT the best description of this modality.

Context: ultrasound relies on sound waves to image tissues, a bone-density test uses a specialized X-ray method, and MRI uses magnetic fields to produce images and isn’t described as “motion imaging.”