乳腺微小病变的X线及MRI对比研究

The X-ray and MRI features of small breast lesions

目的:对比分析乳腺微小病变MRI与X线征象,提高恶性病变早期检出率及诊断率。方法:回顾性研究94例乳腺患者共176处微小病灶的X线、MRI资料,对照影像诊断与病理结果,分析两种方法对乳腺微小病变的诊断价值。结果:病理良性病灶131处、恶性45处,两种检查手段的敏感性、特异性、准确度、阳性预测值、阴性预测值如下:X线71.11%、86.25%、82.38%、64.0%、89.68%;MRI:93.33%、95.41%、94.88%、87.5%、97.66%,X线与MRI诊断乳腺微小病变准确率差异存在统计学意义(χ~2检验,P<0.05)。结论:乳腺微小病变MRI诊断准确性高于乳腺X线摄影,DCE-MRI对早期无肿块型乳腺癌的诊断及敏感性、特异性较高,联合应用有助于提高早期检出率及诊断准确率。

Objective：To improve the preoperative diagnostic accuracy by studying the X-ray and MRI features of small breast lesions.Methods：The X-ray and MRI features of 94 patients with 176 focus confirmed by pathology were studied retrospectively and compared.Results：The pathological results of the whole group were as follows：131 benign lesions and 45malignant ones.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of MRI were as follows：93.33%,95.41%,94.88%,87.5%,97.66%.The above values are higher than X-ray ：71.11%,86.25%,82.38%,64.0%,89.68%.There were statistically significant difference of sensitivity,specificity and diagnostic accuracy between X-ray and MRI （χ2 test,P〈0.05）.Conclusion：MRI has high sensitivity and specificity in the early diagnosis of small breast lesions,occult breast cancer.The diagnostic accuracy is higher than X-ray.Comprehensive analysis of MRI and X-ray is important for accurate preoperative diagnosis.