什么是核磁共振成像 王艳艳 山西省肿瘤医院 скачать в хорошем качестве

什么是核磁共振成像 王艳艳 山西省肿瘤医院

什么是核磁共振成像 王艳艳 山西省肿瘤医院 磁共振检查和CT检查是完全不同的两个检查方式，是运用同样的解剖基础，但是成像原理是完全不同的。??核磁共振成像是利用原子核，在强磁场内发生共振，产生信号，经图像重建的成像技术，??是核物理现象，是将人体至于特殊的磁场中，有无线电射频脉冲，激发人体内的氢原子核，引起氢原子核共振并吸收能量，在停止射频脉冲后，氢原子核按特定频率，发出射电信号，并将吸收的能量释放出来，??被体外的接收器收录，经电子计算机处理，获得图像，??这就叫核磁共振成像，??它对疾病的诊断，具有很大的潜在的优势，??它可以直接作出横断位矢状面冠状面及各种斜面的一个体层图像，不会产生CT检查中的一个伪影；CT出来的图像是重建的图像，可以做出来横断位轴位或者是冠状位的图像，CT的图像是直接是重建出来的，而不是核磁，核磁是直接可以做出相应部位这些体层图像，另外就是它最大的优势，是没有电离辐射，对机体??到现在为止，是没有任何的不良影响的。 What is MRI MRI and CT are totally different, Using the same anatomical basis, But the imaging principle is totally different. Nuclear magnetic resonance imaging uses atomic nucleons Resonance in a strong magnetic field Signal generation Imaging technology after image reconstruction It's a nuclear physical phenomenon It puts the human body in a special magnetic field With radio frequency pulse Excitation of hydrogen nucleus in human body Resonance of hydrogen nucleus and absorption of energy After stopping RF pulse The hydrogen nucleus has a specific frequency Send out radio signal And release the absorbed energy Collected by an external receiver Electronic computer processor Get image theory This is called MRI Its diagnosis of disease, It has great potential advantages It can directly make a single image of the coronal plane of the transverse sagittal plane and various inclined planes It will not produce a artifact in CT examination The image from CT is the reconstructed image t It can be used to make the axial or coronal image of the transverse section CT images are directly reconstructed It's not nuclear MRI can directly make the corresponding parts of these body layer images In addition, its biggest advantages are No ionizing radiation For the body, So far There is no adverse effect