磁敏感加权成像在卵巢子宫内膜异位囊肿中的应用初探

目的探讨磁敏感加权成像(SWI)对卵巢子宫内膜异位囊肿的诊断价值。方法回顾性分析2012年5月至11月期间12例卵巢子宫内膜异位囊肿患者资料,共计16个病灶;选取其他卵巢囊性病变18例作为对照组,均经手术病理证实,所有患者行磁共振成像(MRI)常规扫描及SWI扫描,分析常规MRI图像以及SWI图像囊液及囊壁的信号特征,比较2组病例囊液的校正相位值差异。结果 16个卵巢子宫内膜异位囊肿SWI图像囊壁均可见多个斑点状低信号;经处理后的校正相位图能够清晰显示卵巢囊性病变的形态及内部结构,囊壁及囊内分隔均为低信号,囊液为中等强度信号;其囊液的校正相位值与其他卵巢囊性病变相比,校正相位值差异具有统计学意义(P=0.023)。结论 SWI校正相位图较常规磁共振序列更可清晰显示卵巢囊性病变的形态学特点;SWI结合常规MRI平扫可以提高卵巢子宫内膜异位囊肿的诊断效能。

Susceptibility weighed imaging for diagnosis of ovarian endometriosis cyst

Objective To investigate the value of susceptibility weighted imaging （SWI） for the diagnosis of ovarian endometriosis cyst. Methods We retrospectively analyzed the clinical profiles of 12 cases with ovarian endometriosis cysts, who had a total of 16 lesions, between May 2012 and November 2012. Eighteen patients with confirmed ovarian cystic lesions were enrolled in the control group following surgery. Conventional magnetic resonance imaging （MRI） and SWI scan were undertaken to analyze the characteristics of signals regarding cyst fluid and wall for comparison on the difference in the adjusted phase. Results Multiple low-intensity dotted signals were detected from SWI in 16 affected sites of ovarian endometriosis cyst wall. The morphology and internal structure was explicitly displayed following adjustment of the phase images. This was evidenced by the low-intensity signals lining the cyst wall and internal septum and moderate-intensity signals indicating the presence of cyst fluid. Compared with miscellaneous cystic lesions, endometriosis cyst yielded a significant difference in the adjusted phase （t=-2.395, P=0.023）. Conclusion The adjusted phase images derived from SWI, when compared with conventional MRI, may more explicitly dis play the morphology of ovarian cysts. Their combination is associated with an improved diagnostic power to screen ovarian endometriosis cysts.