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自CT问世以来,近十余年科学家们又研制了一种新的摄影装置即核磁共振摄影(NMRI)系统,以下简称磁共振(MR)。近两年来它在机器制造及临床应用上都取得了新的进展,并已证明它比CT有更大的优越性。一般CT摄影的像素是以物质对X射线的吸收因素为特征的。磁共振的影像则是根据组织内“自由活动”的氢原子(即质子)的分布情况而取得的。这样,用CT无法得到的人体内各组织及
Since the advent of CT, more than ten years scientists have developed a new photographic device that is magnetic resonance imaging (NMRI) system, hereinafter referred to as magnetic resonance (MR). In the past two years it has made new progress in machine building and clinical application, and it has been proved that it has more superiority than CT. Pixels in general CT photography are characterized by matter’s absorption of X-rays. Magnetic resonance imaging is based on tissue within the “free” movement of hydrogen atoms (ie proton) distribution obtained. In this way, the body can not be obtained with the CT of various tissues and