Low R N, Francis I R, Sigeti J S, Foo T K
Sharp and Children's MRI Center/San Diego Diagnostic Radiology, CA 92123-2740.
Radiology. 1993 Mar;186(3):803-11. doi: 10.1148/radiology.186.3.8430191.
T2-weighted fast and conventional spin-echo (SE) and dynamic gadolinium-enhanced fast multiplanar spoiled gradient-recalled (FMPSPGR) images in 26 patients (18 with hepatic masses and eight with no detected abnormality) were compared to determine the efficacy of the newer pulse sequences (fast SE and FMPSPGR) in abdominal imaging. FMPSPGR allows for breath-hold magnetic resonance imaging of the liver. The contrast-to-noise ratio (C/N) of the hepatic lesions was calculated for each sequence and was superior in fast SE compared with that in conventional SE in 16 of 18 patients. Lesion detection was 90% with fast SE and was 85% and 80% for conventional SE and contrast material-enhanced FMPSPGR sequences, respectively. Of the T2-weighted sequences, fast SE showed consistently sharper anatomic structures and less respiratory and cardiac motion artifact. Thus, fast SE (with its superior C/N and shorter imaging time) and gadolinium-enhanced FMPSPGR images, when combined, demonstrate potential value as routine sequences in abdominal imaging.
对26例患者（18例有肝脏肿块，8例未检测到异常）的T2加权快速及传统自旋回波（SE）图像和动态钆增强快速多平面扰相梯度回波（FMPSPGR）图像进行比较，以确定新型脉冲序列（快速SE和FMPSPGR）在腹部成像中的效果。FMPSPGR可实现肝脏屏气磁共振成像。计算每个序列肝脏病变的对比噪声比（C/N），18例患者中有16例快速SE的C/N优于传统SE。快速SE对病变的检出率为90%，传统SE和对比剂增强FMPSPGR序列的检出率分别为85%和80%。在T2加权序列中，快速SE显示的解剖结构始终更清晰，呼吸和心脏运动伪影更少。因此，快速SE（具有更高的C/N和更短的成像时间）与钆增强FMPSPGR图像相结合，作为腹部成像的常规序列显示出潜在价值。
