摘要
目的:研究Propeller LAVA(Liver Accqusition with Volume Acceleration)肝脏三维容积快速多期动态增强扫描对壶腹周围癌的应用价值。材料与方法:应用Propeller LAVA对21例疑壶腹周围癌的病人进行十二指肠低张后增强及延时扫描,应用工作站对所得数据行三维处理,并结合其MRCP和FIESTA(Fast Imaging EmployingSteady-state Accquisition采用稳态采集的快速图像)采集的图像,以3级评分法,判断Propeller LAVA增强扫描对壶腹周围癌直接征象及其临床分型。结果:21例行Propeller LAVA增强扫描者有20例显示肿瘤的直接征象及累及范围,MRCP及FIESTA序列分别有0例和2例显示肿瘤的直接征象及累及范围,三者差异具有统计学意义。(P<0.05)Propeller LAVA增强扫描根据不同类型可表现为肿瘤强化及延迟强化。结论:Propeller LAVA增强扫描能显示壶腹周围癌的直接征象及累及范围,在壶腹周围癌的鉴别诊断上明显优于MRCP和FIESTA序列。
Purpose: To study the value of Propeller LAVA in the diagnosis of periampuUary carcinomas. Materials and Methods: 21 patients with suspected periampullary carcinomas underwent MRI examination after duodenum was in hypo- tonicity. MRI was performed with LAVA dynamic multi - phase contrast enhancement and delayed enhancement, MR cholan- gio- pancreatography(MRCP) pulse sequence and fast imaging employing steady -state accquision (FIESTA)scans. Com- bined with the MRCP and FIESTA images, the reconstructed images of Propeller LAVA sequence were graded by 3 levels (ranks) to evaluate the value and clinical types of Propeller LAVA dynamic contrast sequence on the direct charateristics of periampullary carcinomas. Results: In 21 cases, there were 20 cases demonstrated the direct characteristics and the exten- sion of the tumors by Propeller LAVA sequence while 0 and 2 cases by MRCP and FIESTA, respectively. There was signfi- cant difference of demonstration ability between Propeller LAVA sequence and MRCP or FIESTA ( P 〈 0. 05 ). The tumors were graded into enhancement and delay enhancement according to different types by Propeller LAVA contrast sequence. Conclusion: Propeller LAVA contrast sequence images can demonstrate the direct characteristics and extension of periampul- lary carcinomas and may be better than MRCP and FIESTA sequences on differentiating diagnosis of periampullary carcinomas.
出处
《现代医用影像学》
2010年第1期5-10,共6页
Modern Medical Imageology