利用FID信号直接测量血细胞中水质子的NMR横向弛豫时间

Measurement of NMR transverse relaxation time of water protons in blood cells by using free induction decay signal

通过对商品NMR仪器提供的T_2测量程序的调整和实验方法的改进,实现了血细胞中水质子T_2值的FID法的直接测量,省去了傅立叶变换过程,缩短了测量时间,提高了测量精度。

The direct measurement of transverse relaxation time (T2) of water protons by free induction decay (FID) method is reported. The T2 measurement program and experimental procedures provided by commercial NMR spec-trometer are adjusted and improved for the purpose of the measurement . The Fourier transform process is no longer necessary and the measurement time is reduced while the accuracy is increased. The method provides conditions for multi-exponential fitting of transverse relaxation decay curve.