在医院的临床诊断中,CT(X—CT)已把原来的X线抛在后面,成为当代医学成象技术的佼佼者。然而在科学技术突飞猛进的今天,又出现了更先进的医学成象技术—核磁共振成象技术,简称NMR,由于它借用X—CT成象中的投影和图象处理法,故又称NMR—CT。NMR成象是利用人体水的质子能放出较强的信号。把人体置于强磁场中的螺线管内,螺线管与检测器相连,用射频发生器发射出短暂的射频脉冲照射人体,利用人体内部水的氢原子核出现核磁共振频率的变化, In the clinical diagnosis of the hospital, CT (X-CT) has put the original X-ray behind, becoming the leader in contemporary medical imaging technology. However, with the rapid development of science and technology, more advanced medical imaging technology, such as NMR imaging technology, abbreviated as NMR, is borrowed from the projection and image processing methods in X-CT imaging. Therefore, NMR- CT. NMR imaging is the use of human water proton can emit a strong signal. The human body placed in a strong magnetic field of the solenoid, the solenoid connected to the detector with a radio frequency generator emits a brief radio frequency pulse irradiation of human body, the use of human internal hydrogen atomic nucleus of nuclear magnetic resonance frequency changes,