多层螺旋CT血管造影在判断肝癌寄生供血中的价值

目的探讨多层螺旋CT在判断肝癌寄生供血中的应用价值,分析寄生供血形成的原因。方法回顾性分析40例经DSA证实存在寄生供血的肝癌患者的多层螺旋CT血管造影(MSCTA)表现,比较分析不同MSCTA重建方式在显示肝癌寄生供血方面与DSA的符合率。分析存在肝癌寄生供血病例的MSCTA特征。结果DSA显示寄生动脉50支,MSCTA显示寄生动脉40支,阳性率80%。最大密度投影(MIP)和容积再现技术(VRT)两种重建方式结合能达到最佳显示效果。存在寄生动脉供血的病灶均位于肝脏边缘,长径平均为6.9cm。结论MSCTA在显示肝癌寄生供血方面与DSA有较高的符合率,可应用于介入治疗、外科手术以及肝移植术前的评价。肝癌病灶解剖部位临近裸区和悬韧带,以及病灶巨大对临近器官的直接侵犯、粘连可能是寄生动脉供血形成的主要原因;反复的TACE治疗和随之发生的肝动脉侧支供血减少也是寄生动脉供血形成的重要原因。

Evaluation of MSCTA for parasitic blood supply in hepatic carcinoma

Objective To evaluate the multi-slice spiral computer tomography for hepatocarcinoma parasitic blood supply, and analyze the mechanism of the parasitic angiogenesis. Methods Forty cases confirmed by DSA and confirmed with the existence of parasitic blood supply through manifestations of MSCTA were retrospectively analized. Comparing the coincidence of different reconstruction modalities of MSCTA and DSA in displaying the parasitic blood supply and then to assess the characteristics of MSCTA of the cases with existing parasitic blood supply. Results DSA displayed parasitic blood supply in 50 arterial rami and MSCTA displayed only 40 rami, with positive rate of 80%. The best display could be reached by the reconstruction of combining MIP and VRT. This kind of reconstruction revealed not only the parasitic blood supply but also the peripheral sites of the primary focci with average length of diameter of 6.9 cm. Conclusions MSCTA possesses nearly the same capability with DSA in demonstrating the parasitic blood supply to primary hepatic carcinoma, therefore it could be utilized in evaluation of intervention therapy and surgical, operation and transplantation. The primary hepatic carcinoma with this kind of parasitic blood supply is always located at the bare were of liver and ligmentarn suspensoram together with direct invasion of nearby organs with adhesions may contribute the main factor of parasitic blood supply, furthermore the repetition of TACE inducing the decrease of collateral circulation may also be the another major factor