PULSE SEQUENCE EXTRAPOLATION WITH MR IMAGE SYNTHESIS
PULSE SEQUENCE EXTRAPOLATION WITH MR IMAGE SYNTHESIS
复制标题
DOI：
10.1148/radiology.159.1.3952314
复制
发表时间：
1986-04-01
期刊：
影响因子：
19.7
通讯作者：
WANG, HZ
中科院分区：
文献类型：
--
作者：
BOBMAN, SA;RIEDERER, SJ;WANG, HZ
先前的报告提出了磁共振（MR）图像合成的验证研究，其中使用多个自旋回波（MSE）源数据来生成不同回波时间和重复时间（TR）的自旋回波图像。一种新方法——“脉冲序列外推”——合成与采集图像不同的脉冲序列图像。在相当于 2,000 毫秒 TR 的时间内采集的 MSE 数据可用于生成任意选择的 TI 反转时间的反转恢复 (IR) 图像。还研究了脉冲序列的其他组合，并将合成图像与具有相应参数的直接采集图像进行视觉和定量比较。相对于完整磁化信号，脑实质的合成 IR 信号与直接获取的信号的匹配始终在 6% 以内。正如预测的那样，合成信号的噪声水平通常不超过直接采集信号的两倍。该方法可以实现红外成像中的选择性脂肪抑制和增强。
Previous reports have presented validation studies of magnetic resonance (MR) image synthesis in which multiple spin-echo (MSE) source data were used to generate spin-echo images for various echo times and repetition times (TRs). A new method- "pulse sequence extrapolation"-synthesizes images for pulse sequences different from that of the acquisition. MSE data acquired in a time equivalent to a TR of 2,000 msec can be used to generate inversion-recovery (IR) images for arbitrarily chosen TI inversion times. Other combinations of pulse sequences were also studied, and synthetic images were compared visually and quantitatively to directly acquired images with corresponding parameters. Synthetic IR signals of the brain parenchyma consistently matched directly acquired signals to within 6%, with respect to the full magnetization signal. The noise level of synthetic signals was generally no more than twice that of direct acquisition signals, as predicted. This method can achieve selective fat suppression and enhancement in IR imaging.