低场MRI对乳腺癌的诊断价值

Clinical Application of Low Magnetic Field MRI in Diagnosis of Breast Carcinoma

目的探讨低场MRI对乳腺癌的诊断价值。方法回顾性分析15例经手术病理证实的乳腺癌在低场MR中的I表现,其中7例患者仅行平扫检查,8例患者行平扫及动态增强扫描。动态扫描评价指标采用时间-信号强度曲线。分析病变的形态学特征及增强动力学表现。结果诊断准确率为86.7%。大多数乳腺癌在低场MRI平扫T1WI为等、低信号,在IRFSE为高低混杂信号,增强扫描为不规则形肿块,边缘见毛刺征,边界不清,不均匀环形强化;71.4%为III型曲线。结论低场MRI是诊断乳腺癌的有效影像学方法。T1WI能很好显示乳腺的解剖结构,IRFSE对发现病灶敏感。结合分析病变的形态学特征及增强动力学表现,可提高低场MRI乳腺癌的诊断准确率。

Objective To investigate the clinical applocation of low field MRI in diagnosia of breast carcinoma. Methods The magnetic resonance imaging of 15 patients with breast carcinoma approved by pathology were analyzed retrospectively. 7 patients were examined by plain scan, 8 patients were examined by additional dynamic enhancement scanning. The index of dynamic enhancement scanning was time - signal intensity graph. The image of morphology and enhancement dynamics were analyzed. Results The diagnosis accuracy of MRI of breast carcinoma was 86.7%. The MRI of most breast carcinoma was equal or lower signal intensity on T1W1, inhomogenous signal intensity on inversion recovery of masses, the edge was vague, enhanced signal was circle and inequable. Conclusions MRI is an effective method in diagnosing breast carcinoma. Anatomic structure can be demonstrated clearly on T1W1. The focus is sensitive to IRFSE. The dynamic enhancement scanning is also satisfied with the need of clinical diagnosis. Combination of the feature of morphology and enhancement dynamics can increase the accuracy of low magnetic field MRI in breast carcinoma diagnosis.