论文部分内容阅读
核磁共振是一种物理现象。1973年英国学者Lauterbur首次报道了核磁共振成像技术。自1981年核磁共振被应用到临床医学上以来,在短短的十多年内发展十分迅速。在医学诊断方面已占据重要地位,被公认为是从1895年伦琴发现X线以来,最重要的影像学进展。为避免与核医学的放射成像混淆,我们现在称它为“磁共振成像”(Magnetic ResonanceImaging,简称MRI)。一、磁共振原理简介原子由原子核和电子组成,原子核又由质子和中子组成,电子、质子、中子都有自旋产生磁场的特性。当原子核内的质子和中子数为偶数时,其自旋和磁矩相互抵消,只
Nuclear magnetic resonance is a physical phenomenon. In 1973 the British scholar Lauterbur first reported MRI technology. Since MRI was applied to clinical medicine in 1981, it has developed rapidly in just over ten years. It has occupied an important position in medical diagnosis and is considered to be the most important imaging progress since the discovery of X-ray in Roentgen in 1895. To avoid confusion with radiography in nuclear medicine, we now call it Magnetic Resonance Imaging (MRI). First, the principle of magnetic resonance Introduction atoms from the nucleus and electrons, the nucleus is composed of protons and neutrons, electrons, protons, neutrons have a spin magnetic field characteristics. When the number of protons and neutrons in the nucleus is even, the spin and magnetic moments cancel each other, only