Computerized tomography ( ct ) is a typical non - invasive examination technique , which can depict anatomical structures without damaging the human body 計(jì)算機(jī)斷層成像技術(shù),是一種非介入式的檢測(cè)技術(shù)
In medicine , there is a still growing interest in non - invasive examination techniques which can depict anatomical structures without damaging the human body 在臨床醫(yī)學(xué)中,非介入式的檢測(cè)技術(shù)不斷的引起人們的興趣。這種技術(shù)能夠讓醫(yī)生不通過(guò)外科手術(shù)就能觀察到人體內(nèi)部的解剖結(jié)構(gòu)。
Computerized tomography ( ct ) is a typical non - invasive examination techniques in medicine , which can depict anatomical structures without damaging the human body . lt is based on the principle : under a number of angles , the x - ray attenuation in a cross section of a human body is measured by detector resulting in a set of profiles . this set of profiles is called the radon transfoim of the object in mathematics . the problem now is to reconstruct a two - dimensional image via inverting its radon transform 它所基于的成像原理是:人體的某個(gè)剖面在若干個(gè)角度上被x射線束照射,照射后x射線的衰減量被檢測(cè)器記錄下來(lái),形成投影集合,數(shù)學(xué)上將這個(gè)投影集合描述為該剖面的radon變換,通過(guò)反演radon變換就能夠重建剖面的二維圖像。