Infographics / CT Physics

Scanner generations, gantry geometry & bow-tie filtration

Four aligned panels. Gen 1: pencil beam with a single detector, translate then rotate. Gen 2: narrow fan with a few detectors, translate then rotate. Gen 3: wide fan with a curved detector arc that rotates with the tube (rotate-rotate). Gen 4: rotating tube with a stationary full detector ring. The x-ray beam is highlighted in teal in every panel.

CT scanner generations compared by tube and detector geometry Four aligned panels. Gen 1: pencil beam with a single detector, translate then rotate. Gen 2: narrow fan with a few detectors, translate then rotate. Gen 3: wide fan with a curved detector arc that rotates with the tube (rotate-rotate). Gen 4: rotating tube with a stationary full detector ring. The x-ray beam is highlighted in teal in every panel. CT scanner generations: tube and detector geometry Gen 1 pencil beam, 1 detector translate then rotate Gen 2 narrow fan, few detectors translate then rotate Gen 3 wide fan, detector arc rotate-rotate (arc turns with tube) Gen 4 wide fan, full ring tube rotates, ring stationary x-ray beam x-ray tube patient detectors
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