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- W2265469897 abstract "In 1968 Hounsfield finally decided about taking the major step of using his earlier work on imaging in the medical field. He used a lathe bed for scanning a phantom. The scan time was nine hours and the processing time two hours. Of consequence was the final picture of a human brain in which the grey and white matter could be clearly distinguished. The first patient was scanned in 1972 in 4 minutes, already a great progress in scan time. This was the first generation scanner, the second generation being the translate-rotate type, the third generation being the rotate-rotate type and the fourth generation being the fixed ring detector system. The last three types are in current use. This has been the progress in the scanning system. The progress has been rapid in the computer, x-ray and detector areas. Progress in the gantry section has helped reduce scan time to as low as 1 sec in third and fourth generation scanners thereby eliminating motion artefacts. Finer collimation has improved resolution to a great extent helped along by higher energy rotary anodes with finer foci and also by smaller detector sizes. The detectors in greater use being solid-state detectors and xenon gas detectors. Software development has helped image manipulation and analysis of data. Three dimensional imaging facilities are being offered by a few companies. Faster processors offer near real times images. The choice of image storage facilities are vast with magnetic tape, multi format hard copiers, hard disks, floppy disks, and optical disks. Speed of access to data and mass storage being the deciding factor." @default.
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- W2265469897 date "1986-02-01" @default.
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- W2265469897 title "Progress & The Current State Of Art Of C. T. Systems" @default.
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