B-FFE序列在MRI引导下肝癌射频消融术的应用-现代医学

B-FFE序列在MRI引导下肝癌射频消融术的应用

单位：江苏省肿瘤医院、江苏省肿瘤防治研究所、南京医科大学附属肿瘤医院医学影像科, 江苏南京 210009

分类号：R735.7

出版年·卷·期（页码）：2018·46·第二期（173-176）

摘要：

目的：评估磁共振平衡全稳态快速场梯度回波（B-FFE）序列引导行肝癌射频消融手术的应用价值。方法：48例患者52个肝癌病灶，磁共振引导下行肝癌射频消融手术。Achieva 1.5T超导MR扫描机，专用4通道相控腹部线圈，Olympus Celon双极/多极射频消融治疗仪。穿刺定位采用B-FFE快速序列进行信号的采集，疗效评估时采用B-FFE快速序列、T2和DWI序列扫描。结果：52个病灶全部一次定位成功，治疗过程中B-FFE序列能从不同角度快速得到病灶与射频治疗针之间的位置关系。射频治疗结束后，B-FFE序列、T2序列、DWI序列都能清楚观察到病灶周围的“圆环征”。图像扫描一次，B-FFE序列、T2序列、DWI序列所需时间分别为（11.10±0.85）秒，（85.21±5.82）秒和（58.88±2.03）秒（F=5697.22，P=0.00）。结论：磁共振B-FFE快速序列信号采集时间短、成像清晰，可以用来MRI引导肝脏肿瘤射频消融术。

Objective: To evaluate the value of a magnetic resonance imaging sequence, steady-state balance fast field echo(B-FFE), for radiofrequency ablation in liver cancers. Methods: Forty eight patients including 52 lesions in the liver were collected. Rradiofrequency ablations were performed using Achieva 1.5T superconducting MR scanner with a unique 4 channels phased abdominal coil and Olympus/Celon bipolar. B-FFE rapid sequence was used for the guidance of radiofrequency ablation. Curative effect was evaluated with MRI using B-FFE, T2WI and DWI. Results: Fifty two liver cancers were all successfully localized. Radiofrequency needle punctured in the tumor were finely observed with B-FFE sequence. The scanning time of B-FFE sequence, T2WI sequence, and DWI sequence were (11.10±0.85), (85.21±5.82), (58.88±2.03) seconds respectively(F=5 697.22,P=0.00). Conclusion: MRI B-FFE prompt sequence is the preferred sequence for MRI guided radiofrequency ablation in liver cancers.

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