Computed tomography with a linear accelerator with radiotherapy applications.
An earlier paper [Simpson et al., Med. Phys. 9, 574 (1982)] described a computed tomography (CT) scanner that was constructed by adding a detector array to a 4-MV isocentric linear accelerator. Since the previous article, the detector array has been improved and we now demonstrate better than 3-mm spatial resolution and better than 1% relative electron density discrimination. A series of pictures from volunteer patients is included. Normal anatomy is visualized with bone, muscle, fat, and air being clearly delineated.
D000328:Adult; D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002283:Carcinoma, Bronchogenic / Q000000981:diagnostic imaging; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging; D008297:Male; D008545:Melanoma / Q000000981:diagnostic imaging; D009369:Neoplasms / Q000532:radiotherapy*; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging; D010315:Particle Accelerators; D010347:Patient Care Planning / Q000379:methods*; D010610:Pharyngeal Neoplasms / Q000000981:diagnostic imaging; D011882:Radiotherapy, High-Energy / Q000295:instrumentation; D012004:Rectal Neoplasms / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*