摘要
目的 探讨联合应用定量定性标准 ,建立一个最佳的乳腺动态MRI诊断标准。资料与方法 回顾性分析 4 0例 4 5个乳腺病变 ,其中恶性病变 19个 ,良性病变 2 6个。 6例患者仅行平扫检查 ,34例患者行动态增强扫描。动态资料的评价参数包括 :早期增强率、时间 信号强度曲线类型以及病变的形态学特征。结果 大多数病变在平扫自旋回波序列MRI上不显影 ,以早期增强率≥ 6 0 %为诊断标准 ,敏感性为 5 6 .3% ,特异性 81.8% ;以Ⅲ型曲线为诊断标准 ,敏感性为 6 2 .5 % ,特异性 95 .5 % ;以形态学特征为诊断标准 ,敏感性为 5 0 % ,特异性 90 .9% ;联合应用定量定性诊断标准 ,敏感性为 87.5 % ,特异性 95 .5 %。结论 MR平扫在乳腺病变的发现和定性方面不准确 。
Objective To establish an optimal MRI diagnostic criteria for breast lesions by using a combination of quantitative with qualitative criteria. Materials and Methods Plain or dynamic contrast enhanced MRI findings of 45 breast lesions in 40 patients were retrospectively analyzed. The lesions included 19 malignant ones and 26 benign ones. Plain MR scanning was performed in 6 and dynamic contrast enhanced MR scanning in 34 patients. The parameters for evaluation in dynamic contrast enhanced MRI included early enhancement rate, time signal intensity curve pattern and lesion's morphological features.Results On plain SE MRI, most lesions could not be demonstrated. When early enhancement rate ≥ 60% was taken as criterion, the sensitivity and specificity were respectively 56.3% and 81.8%. When pattern Ⅲ of time signal intensity curve was taken as standard, the sensitivity and specificity were 62.5% and 95.5%, respectively. When the diagnosis was based on the morphological features, the sensitivity and specificity were 50.0% and 90.9%, respectively. Using quantitative qualitative combined criteria, the sensitivity reached to 87.5% and the specificity was up to 95.5%. Conclusion Plain MRI has limitation in detecting and identifying the lesion. The use of quantitative qualitative combined criteria can improve MRI diagnosis for mammary disorders.
出处
《临床放射学杂志》
CSCD
北大核心
2004年第1期31-35,共5页
Journal of Clinical Radiology
