MRI动态增强扫描I型曲线的临床意义

目的 探讨乳腺MRI动态增强扫描I型时间-信号强度曲线(time-signal intensity curves,TIC)的临床意义.方法 析53例乳腺磁共振扫描患者的MRI表现.MR扫描机为Signa Excite HD 3.0 T超高场装置.扫描序列包括轴面T1WI,轴面和矢状面反转恢复脂肪抑制(STIR)T2WI...

Clinical significance of time-signal intensity curve type I on dynamic contrast-enhanced MRI of the breasts

Objective：To explore the value of time-signal intensity curve（TIC） type I in identifying enhanced lesions of the breasts on dynamic contrast-enhanced MRI（DCE-MRI）.Materials and methods：Fifty-three patients with breast lesions performed MRI examinations at 3.0 T scanner.Numbers and features of the lesions were analyzed on axial FSE T1WI,axial and sagittal STIR T2WI,and 3-dimentional DCE-MRI after intravenous gadolinium administration.TIC types of the enhanced lesions were classified according to their shapes as type I,which was steady enhancement;type II,plateau of signal intensity;or type III,washout of signal intensity.Results：Among fifty-three female patients,abnormally enhanced lesions with TIC type I on DCE-MRI included benign lesions in 36（breast adenosis 17,breast cystic hyperplasia 4,breast fibroadenoma 13,intraductal papilloma 2）,untreated malignant lesions in 8（ductal carcinoma in situ 3,mucinous carcinoma 4,invasive ductal carcinoma 1） and residual lesions of breast carcinoma following neoadjuvant chemotherapy in 9.Conclusion：TIC type I may be found in both benign and malignant lesions of the breasts,it is necessary to combine with morphological characteristics and clinical history for a correct judgment.