CT(computedtomography,計(jì)算機(jī)體層攝影)是計(jì)算機(jī)與X線技術(shù)相結(jié)合的產(chǎn)物:以一束很窄的X線從多個(gè)角度對(duì)人體某一定厚度的層面進(jìn)行掃描,由探測(cè)器接收透過(guò)該層面的剩余X線,經(jīng)光電轉(zhuǎn)換形成電信號(hào),經(jīng)模-數(shù)轉(zhuǎn)換后,計(jì)算機(jī)先計(jì)算出線性的X線 (共 496 字) [閱讀本文] >>