纵向弛豫

正常成人肺脏MRI纵向弛豫时间的测量

MRI Measurement for Normal Adult Lung on Longitudinal Relaxation Time

目的对正常成人肺脏MRI纵向弛豫时间进行测量研究。

Objective To study longitudinal relaxation time of lung in MRI for normal adult .

同时报导了我们对孔雀绿（Malachitegreen）水溶液的纵向弛豫时间T1的实验测量结果。

The experiment result of the longitudinal relaxation time T_1 associated with the S_0-S_1 ele - ctronic transition of Malachite Green solution is also reported .

采用PRFT法估测了四种甲基化腐植酸中各类碳的纵向弛豫时间T1值的范围。

The spin lattice relaxation time values ( T_1 ) of different types of carbons in the methylated humic acids from four soruces are estimated with PRFT method .

用非相干光激发布居光栅技术研究物质的纵向弛豫过程

Studies on Material Longitudinal Relaxation with Population Grating Excited by Incoherent Light

分子间多量子相干信号的线形理论、旋转坐标系纵向弛豫性质及其磁共振成像应用

Lineshape and Rotating-frame Longitudinal Relaxation of Intermolecular Multiple-Quantum Coherences , and its MRI Applications

二位快交换条件下的水合Fe~（3+）配合物纵向弛豫速率的测定

The determination of longitudinal relaxation rate of fe ( h_2o ) _6 ~ ( 3 + ) complex under fast exchange system of two sites

首先推导出纵向弛豫和横向弛豫与磁化强度矢量偏转角关系的数学表达式。

A mathematical formula of the relation between longitudinal relaxation or transverse relaxation and the flip angle of magnetization vector was deduced and its programme was designed .

受精后卵子中水质子的纵向弛豫时间明显比受精前增加，而且在一定的时间范围内，随卵子与精子混合时间延长，T1值有随之增大的趋势。

The T1 values measured after egg fertilization are significantly larger than that measured before fertilization and within a certain period , such tendency increases with prolonging fertilization duration .

得出的纵向和横向弛豫时间是外加交变场频率的函数，这反映了高频场对弛豫的影响是由于所用密度矩阵方程为非马尔科夫型的直接结果。

The longitudinal and transverse relaxation times have been obtained as functions of the external alternating field .

在原子纵向坐标充分弛豫的条件下，得到处于最低基态总能量下LaNi5晶体的非平整表面空间结构及其电子结构。

The geometrical surface structure of LaNi_5 crystal and its electronic structure having lowest ground_state energy are obtained , with the full relaxation of atomic positions along the direction perpendicular to the surface .

结果表明：①射频场的扰动和辐射阻尼效应将导致纵向磁化与横向磁化的耦合，从而使纵向弛豫对线型产生了一定的影响。

By a series of analytical deduction and numeric simulation , the following detailed conclusions are presented : ① NMR lineshape will be quite different because of the coupling between the transverse magnetization and the longitudinal magnetization by RF field or RD effects .