摘要
目的:探讨MRI对乳腺疾病的临床应用价值。方法:回顾性分析135例经手术病理证实的乳腺疾病患者的病例资料。分析比较乳腺良恶性病变的MRI平扫和动态增强表现及时间-信号强度曲线(TIC)的特点,并与乳腺X线摄影结果进行对照。结果:135例患者共发现142个病灶,其中恶性病变64个,良性病变78个。乳腺良性病变的主要平扫MRI表现:T1WI呈低信号42个、等信号32个、高信号4个;T2WI呈低信号2个、等信号20个、高信号56个。恶性病变的主要平扫MRI表现:T1WI呈低信号48个、等信号14个、高信号2个;T2WI呈低信号1个、等信号13个、高信号50个。增强扫描:良性病变多为较均匀强化,以Ⅰ型(持续强化)曲线为主(56个);恶性病变强化多不均匀、以Ⅲ型曲线(廓清型)为主(47个)。动态增强扫描对乳腺良恶性病变的诊断符合率为90.8%,优于平扫MRI(71.8%)和乳腺X线摄影(65.5%)。结论:MRI平扫加增强扫描是评价乳腺疾病的一种有效影像学方法,尤其是动态增强MRI更有助于良恶性病变的鉴别。
Objective：To investigate the application value of MRI in the diagnosis of breast diseases. Methods：The clinical and imaging materials of 135 patients with breast lesions confirmed by surgery or pathology were included in our collection. All the lesions had been examined and evaluated witb. conventional and dynamic contrast enhanced MR scans. The different MRI manifestations and time-intensity curve （TIC） of breast diseases were analyzed and compared with the relative findings in mammography. Results： There were 142 lesions including 78 benign and 64 malignant lesions. The results examined with conventional MRI scans in benign lesions showed that there were 42 lesions with hypointense signal intensi- ty, 32 lesions with isointense signal intensity and 4 lesions with hyperintense signal intensity on TI WI images,and on T2 WI images,2 lesions with hypointense signal intensity,32 lesions with isointense signal intensity and 56 lesions with hyperintense signal intensity were detected. The examination results with conventional MRI in malignant lesions showed that there were 48 lesions with low signal intensity, 14 lesions with equal signal intensity which was simulating that of muscles and 2 lesions with high signal intensity on Tl WI images;on T2WI images, 1 lesion with low signal intensity, 13 lesions with equal signal intensity and 50 lesions with high signal intensity were demonstrated. On contrast enhancing scans, most of the benign breast lesions enhanced rather homogeneously, the TIC revealed a type I （continuously enhanced type, n=56）, while most of the malignant lesions showed heterogeneous enhancement and TIC of type In （wash-out type,n=47）. The diagnostic compatibility rate of breast dynamic enhanced scans in the examination of breast benign and malignant lesions was 90.8% ,which was better than that of conventional breast MRI （71.8%） and also that of X-ray mammography （65.5%）. Conchlsion： In the evaluation of breast diseases, breast MRI was an effective imaging examination modality,especially,its dynamic contrast enhanced scan was very helpful in the differential diagnosis between benign and malignant lesions of the breast.
出处
《放射学实践》
2007年第11期1144-1147,共4页
Radiologic Practice
