高强度聚焦超声治疗肝细胞癌的MRI观察

目的:分析原发性肝细胞癌高强度聚焦超声(highintensityfocusedultrasound,HIFU)治疗后的早期MRI表现。方法:29例经病理诊断为肝细胞癌患者在HIFU治疗前、后行腹部轴位T1WI,轴位T2WI,冠状位SPIR,以及Gd-DTPA增强后T1WI轴位、FFE序列冠状位扫描。观察HIFU治疗前后肿瘤的大小及MRI信号改变。结果:HIFU治疗36个瘤灶,其中28个缩小(77.8%),5个增大(13.9%),3个无明显变化(8.3%);T1WI增强30个瘤灶(83.3%)出现无信号增强区,12个瘤灶无增强区周围见环状增强,7个强化环内见低信号环(T1WI、T2WI、SPIR)。治疗后T1WI19个(52.8%)信号强度增加,T2WI17个(47.2%)信号强度减弱。结论:HIFU治疗后,肝癌瘤灶内可出现多种MRI信号改变,MRI是HIFU治疗效果评估的一种无创而有效的影像学方法。

MRI of hepatocellular carcinoma following the treat of high intensity focused ultrasound

Objective To analyze the MRI findings of hepatocellular carcinoma treated with high intensity focused ultrasound (HIFU).Methods Abdoman MRI was performed in 29 patients with hepatocelluar carcinoma before and after HIFU treatment.The MR sequences included axial T1WI SE,axial T2WI TSE,coronal SPIR,and Gd- DTPA enhanced axial T1WI SE and coronal FFE. Observational the tumor's size and signals changes in front of and back of HIFU treatment in MRI. Results 36 hepatocelluar carcinoma lesions were treated by HIFU...