首页>
外国专利>
Process for producing spin echo impulse sequences with a nuclear spin tomograph and nuclear spin tomograph equipped for carrying out this process
Process for producing spin echo impulse sequences with a nuclear spin tomograph and nuclear spin tomograph equipped for carrying out this process
展开▼
机译:用核自旋断层扫描仪和配备有执行该方法的核自旋断层扫描仪产生自旋回波脉冲序列的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
In nuclear spin tomography disturbances are encountered as a result of the insertion of the gradient fields, which disturbances are due to the generation of eddy currents and lead to field distortions making themselves felt, among other things, in the rapid decay of the echo signals of spin echo pulse sequences, i.e. in disturbances of the rephasing conditions. According to the invention, the rephasing conditions required for generating spin echo impulse sequences can be established either by varying the value of the static magnetic field between the excitation pulse and the next following rf pulse of a spin echo pulse sequence, or else by adjusting the interval between the excitation pulse and the next following rf pulse to a value different from half the interval between the subsequent rf pulses.
展开▼