常规SE序列和动态增强MRI诊断肝局灶性病变的比较

目的比较常规SE序列与动态Gd-U．----x增强扫描对肝局灶病变的诊断价值。方法对34例肝局灶病变做了常规SE平扫和动态Gd-U．---A增强及延迟万WI增强扫描；就各序列对肝局灶病变的检出率、病变的信噪比（C／N）值和图像质展进行定员和定性分析。结果36例共142个病灶，动态Gd-lyl？l？A检出率（138／142，958％）明st高于IFZWI和延迟TW［增强（128／14，叨％；119／142，838％）（P＜005）：动态Gd-IJ：1713A增强的C／N值高于TZWI和TIWI延迟增强（P＜0．05）；动态增强的伪影较L们少（P＜0．01），而病灶清晰度各序列之间无明显差别（P＞0．历）。结论动态u-ly：1717A增强扫描在病灶检出率、图像质显反C／N值方面均优于IWI，对肝局灶病变的诊断是一种有价值的方法，

Diagnosis of focal liver lesions:comparison of non-enhanced conventional SE and dynamic Gd-DTPA contrast-enhranced MR imaging

Purpose To commp the non-enhanced conventional SE, images with breath-hold dynamic Gd DTPA contanced MR images in the diagnosis of focal liver lesions. Methods Conventional T1-and T2-weithted images, breath-hold dynamic MR imags and delayed postcontrast T1 -weithted images were performed in thirty-six patients with 142 focal liver lesions. For all MR sequences, the lesion detection, contrast to noise ratio (C/N), image quality and incidence of artifact were studied and evaluated. Results More lesions were detected on dynamic Gd-DTPA contrast-enhanced images (138/142. 95. 8% ) than on conventional T2WI (128/142,90. 1 % ),and delayed postcontrast T1WI (119/142- 83. 8% ) (P < 0.05 ). The C/N value and image quality of bynamic Gd-DTPA contrast -enhanced images were superior to those of conventional T2WI(P<0.05, P < 0. 01 )and less artifacts were found in the former (P < 0.01 ). No diffence in lesion conspicuity was found in all sequences(P > 0. 05). Conclusionc Gd-DTPA eontrast-enhanced imaging is superior to conventional T2WI imaging in lesion detected, C/N value and image quality ,it is a useful method in diagnosis of focal liver lesion.