肛瘘磁共振LAVA增强扫描的临床应用与评价

The Clinical Application of MR LAVA Enhanced Scanning in Diagnosing Anal Fistula

目的评价肛瘘MRI肝脏容积加速采集(LAVA)增强扫描的临床应用价值。方法分析27例手术治疗患者的肛瘘资料,以手术结果对照,比较MRI平扫、LAVA增强扫描、直肠腔内超声之间的差异。结果在肛瘘内口位置和数目检出与手术结果符合率方面,MRI平扫<LAVA增强<直肠腔内超声,直肠腔内超声具有明显的优势;在瘘管路径和数目方面,MRI平扫<直肠腔内超声<LAVA增强;在诊断脓肿位置和数目方面,直肠腔内超声<MRI平扫=LAVA增强,MRI平扫和LAVA增强具有显著优势。结论 LAVA增强扫描具有明显的肛瘘MRI诊断应用价值,同时结合直肠腔内B超可显著提高肛瘘的影像诊断水平。

Objective To discuss the clinical application of magnetic resonance liver acquisition with volume accelera- tion （LAVA） enhanced scanning in diagnosing anal fistula. Methods The clinical data of 27 cases with anal fistula were retrospectively analyzed. Surgery was employed in all patients. Plain MRI, LAVA enhanced scan and endorectal ultra- sonography were performed in all patients. The results were compared among the three examinations and the surgical find- ings were used as reference standard. Results In aspect of coincidence rate of the inner orifice position and the number of anal fistulae between the imaging detection and surgical results, plain MR scan was lower than LAVA enhanced scan, with endorectal ultrasonography being the highest, indicating that endorectal uhrasonography was superior to plain MR and LAVA ; in aspect of the detection rate of the path and number of fistulae, the analysis showed plain MR scan 〈 endorectal ultrasonography 〈 LAVA enhanced scan; and in aspect of diagnosing the position and number of abscess, the analysis re- sult was endorectal uhrasonography 〈 plain MR scan = LAVA enhanced scan, indicating that both plain MR scan and LAVA enhanced scan were better than endorectal ultrasonography. Conclusion LAVA enhanced scan has obvious appli- cation value in diagnosing anal fistulae, this technique can significantly improve the diagnostic level of anal fistula when en- dorectal uhrasonography is together employed.