A CT scan is the process of acquiring a series of X-ray projections from multiple angles to generate a computed tomography (CT) image. There are two primary scanning geometries. The first, common in industrial CT systems, involves rotating the object (often on a turntable) while the X-ray source and detector remain stationary. The second, used in medical CT scanners, involves rotating the X-ray source and detector around a stationary subject, such as a patient. In both approaches, the collected set of projection data is computationally reconstructed to create a cross-sectional or 3D volumetric image.
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