3.0T磁共振LAVA-FLEX序列对胰腺肿瘤的诊断价值

目的：探讨LAVA-FLEX成像技术在胰腺肿瘤诊断中的应用价值。 方法：收集12例经病理证实的胰腺癌患者，术前行3.0T磁共振常规序列、DWI和LAVA-FLEX序列检查，观察与分析LAVA-FLEX序列与常规扫描序列在胰腺癌病变的敏感性和特异性。 结果：12例胰腺癌在常规序列显示胰腺癌为长T₂信号灶8例，略长T₂信号2例，等T₂信号2例，12例在DWI均呈高信号，T₁WI呈等信号。LAVA-FLEX序列图像质量高，压脂均匀，组织对比度高，扫描速度快，12例胰腺癌均呈低信号，较常规T₁WI具有明显优势。注射对比剂增强后特征性明显。 结论：LAVA-FLEX序列作为新技术，在胰腺癌诊断中具有与DWI相近的特异性与敏感性，可取代常规T₁WI、压脂T₁WI和3D动态增强T₁WI序列。

The diagnostic value of 3.0T magnetic resonance LAVA-FLEX sequence on pancreatic tumor

Objective:To investigate the diagnostic value of 3.0T magnetic resonance LAVA-FLEX sequence in detecting pancreatic adenocarcinoma. Methods:12 patients with pathologically proved pancreatic adenocarcinoma were enrolled in this study, whose imaging data of LAVA-FLEX and conventional sequences and DWI preoperative with 3.0T MRI prior to surgery were analyzed in terms of the sensitivity and specificity. Results:8 cases showed long T₂ signal, 2 showed slightly long T₂ signal, and ₂ showed even T₂ signal. All 12 cases showed high signal in DWI, and the same signal intensity in T₁WI. LAVA-FLEX showed low signal in all 12 cases, indicating an obvious advantage over the conventional T₁WI. Conclusions:LAVA-FLEX as a new technology sequence, has similar specificity and sensitivity as DWI in diagnosis of pancreatic adenocarcinoma, and it can replace the conventional T₁WI, Fat-saturation T₁WI and 3D dynamic enhanced T₁WI.