肝癌伴门静脉癌栓DWI和ADC表现初步探讨

The Preliminary Study on the Findings of Diffusion-Weighted Imaging & Apparent Diffusion Coefficient on the Hepatocellular Carcinoma with Portal Vein Tumor Thrombus

目的初步探讨肝癌和门脉癌栓DwI和ADC表现。材料和方法报道36例肝癌（45个癌灶）伴门脉癌栓（39支），所有患者均作肝脏MRI平扫、DWI和ADc成像、多期增强或动态扫描。结果在增强动脉期，有41个癌灶和32支门脉癌栓强化。在DwI和ADC图上，癌灶表现高、低信号的分别有43和35个，PVTT表现为高、低信号的分别有37个和30支。癌灶和PVTT的DWI、ADC表现与癌灶和PVTT的动脉期强化表现比较，无显著差异（P〉0．05）。癌灶和PVTTADC值分别为（1．134±0．205）×10-3mm2／s和（1．016±0．473）×10-3mm2／S，无显著差异P〉0．05：癌灶和PVTT的ADC值双侧95％置信限分别为1．062～1．206×10-3mm2／s和0．909～1．123×10-3mm0／S，无显著差异P〉0．05。结论PVTT与肝癌的DWI和ADC表现相似，这些表现可以为肝癌和PVTT的MRI诊断提供参考。

Objective To explore the findings of diffusion-weighted imaging（DWl） ＆ appar- ent diffusion coefficient（ADC） in the hepatocellular carcinoma with the portal vein tumor thrombus （PVTT）. Materials ＆ Methods 36 cases of HCC （45 lesions） with PVTT （39 branches） were reported, 36 cases were made by non-enhancement ＆ DWI ＆ ADC ＆ MRI multiphase enhancement or dynamic scan. Results 41 of 45 HCCfocuses ＆ 32 of 39 branches of PVTT were enhanced dnring the arterial phase of enhancement. 43 ＆ 35 of HCC focuses ＆ 37 ＆ 30 branches of PVTT were respectively showed a high ＆ low signal on DWI and ADC images in the group. The incidence of MRl findings of low signal on ADC ＆ high signal on DWI ＆ enhanced on the arterial phase were showed no significant differ- ence （p 〉 0.05） between the HCC lesions ＆ PVTT. The values of ADC of HCC focuses ＆ PVTT were respectively as （1.134 ± 0.205） × 10-3mm-2/s ＆ （1.016 ±0.473） × 10-3mm-2/s ＆ between the values of ADC of the HCC ＆ PVTT were no significant difference （p 〉 0. 05）. The between of the confidence interval of values of bilateral 95% of ADC of HCC focuses ＆ that of PVTT were 1.062 - 1.206 × 10-3mm2/s ＆ 0.909 - 1.123 × 10-3mm2/s respectively. The values of ADC of the two kind of lesions showed no significant difference （p 〉 0.05）. Conclusion It was similar to the findings ofADC＆ DWI between PVTT ＆ that of HCC focuses ＆ the findings of MRI can be for the MRI diagnosis of HCC ＆ PVTT provided supplementary.