Propeller LAVA技术对原发性肝癌MRI的诊断价值

目的:探讨在GESigna1.5T超导型磁共振成像仪使用肝脏容积超快速三维成像(Propeller LAVA)序列作多期动态增强扫描对原发性肝癌的诊断价值。方法:回顾性分析了36例经手术、实验室检查、穿刺活检及病理证实的原发性肝癌患者的MRI表现,分别采用常规自旋回波序列(T2Wl、T1WI)、LAVA序列增强多期(动脉早期、动脉晚期和门静脉期)扫描及T1WI常规增强扫描;分别观察各序列肿瘤病灶显示的数量、MR征像及LAVA序列各期病灶强化程度、强化规律,病灶血供及肝血管解剖关系。评价各序列对病灶的显示、形态及定性能力。结果:LAVA序列增强多期扫描发现53个病灶(100%),2D-T1WI常规增强扫描发现48个病灶(90.6%),P<0.05,T2WI、T1WI平扫分别发现病灶为44个(83.3%)及41个(77.7%),P<0.05,LAVA序列对病灶各期抓取准确,动脉期及门静脉血管图像显示清晰,16个病灶可显示其血供关系。结论:LAVA序列多期动态增强对原发性肝癌的病灶显示,血供关系及肝血管显示方面较常规序列具有较大优势。

ValUe or MR Imaging with Propeller LAVA Technology in Diagnosis Primary Liver Carcinoma

Objective To evaluate the value of MRI imaging with propeller LAVA technology in diagnosis primary livercarcinoma(PLC).Methods The comprehensive MRI find were analyzed retrospectively in 36 PLC patients verified by operation,laboratory tests,and pathology.The MRI examinations included routine T1WI and T2WI scanning,enhanced T1WI scanning and enhanced multi-phasic(early arterial phase,late arterial phase and portal venous phase)LAVA scanning.The lesion number and MRI features in each sequences,the contrast-enhanced degree,regulation,blood supplying and anatomical relatives with hepatic blood vessels of each lesion on three-phases in LAVA sequence were carefullv observed.The lesion detection rates and lesion characterization ability were compared among various MRI sequences.Results 44(83.3%),41(77.7%),48(90.6%)and 53(100%)foci were displayedrespectively on T2WI,non-enhanced T1WI,enhanced T1WI,and dynamiC enhanced 3D-LAVA images(P<0.05).The Vascular images on both arterial and venous phases of LAVA sequenCe were both Clearly displayed,and the feeding arteries and draining vein of l6 foci were clearly depicted after reconstruction.Conclusion LAVA sequence images are better than regular sequences images in lesion detection,characterization for PLC and hepatic blood vessels displaying.