MR CHARACTERIZATION OF SUSPICIOUS BREAST-LESIONS WITH A GADOLINIUM-ENHANCED TURBOFLASH SUBTRACTION TECHNIQUE

PURPOSE: To assess the utility of gadolinium-enhanced dynamic magnetic resonance (MR) imaging with turbo fast low-angle shot (Turbo-FLASH) t echnique in the differentiation of benign from malignant lesions of th e breast. MATERIALS AND METHODS: Contrast material-enhanced MR images were obtained at intervals of 2.3 seconds for 2 minutes. After the fir st four images were obtained, contrast medium was intravenously inject ed within 10 seconds. Lesions that enhanced within 11.5 seconds after the aorta opacified were regarded as malignant. Lesions that enhanced more than 11.5 seconds after the aorta were regarded as benign. A cent rifugal pattern of enhancement was regarded as a sign that a lesion wa s benign. RESULTS: Eighty-seven lesions were evaluated. Histologic exa mination showed 65 lesions were malignant and 22 were benign. Gadolini um-enhanced TurboFLASH imaging had a sensitivity of 95%, a specificity of 86%, and an overall accuracy of 93% in differentiating benign from malignant lesions. CONCLUSION: Gadolinium-enhanced TurboFLASH imaging is a valuable method in the examination of breast lesions suspected o f being malignant.