Computed tomography images can be reconstructed into which type of images?

• A. Three-dimensional volumes
• B. Time-lapse sequences
• C. Color-coded angiograms
• D. Cross-sectional images

Answer: (D)

Computed tomography data are reconstructed to create a series of two-dimensional slices that cut through the body—these are cross-sectional images. The scanner collects attenuation data from multiple angles and the reconstruction algorithm turns that data into thin axial planes, which you view as individual cross-sections. By stacking these slices, you can form a three-dimensional understanding, but the fundamental reconstructed output is the cross-sectional image at each level.

Post-processing can then generate other formats, such as 3D volumes or color-coded representations, but those derive from the cross-sectional slices rather than being the direct reconstruction. Time-lapse or dynamic sequences and angiograms involve additional processing or sequential imaging steps beyond the basic reconstruction.