Kuwabara M
Department of Radiology, St. Marianna University School of Medicine.
Nihon Igaku Hoshasen Gakkai Zasshi. 1991 Nov 25;51(11):1366-74.
Breast MR imaging is now expected as the third most important diagnostic modality. The author investigated relationship between signal intensity of T2 weighted images (T2WI) and various pathological findings of 51 mass lesions in 51 female patients. T2WI were not effective in differentiation between malignant and benign lesions. High signal intensity areas defined visually well correlated with pathological tissues with large water content such as necrosis, edema, cyst and dilatated ducts. There was also good correlation between low signal intensity areas and pathological tissue with less water content such as fibrosis, scar, and hyalinization. Signal intensity measured by tumor/fat ratio had no correlation with water content. It probably indicates that visually defined signal intensity is more reliable than the measured ratio. In conclusion, it is warranted to say that T2WI is a good tool for investigating secondary changes of breast tumors and helpful in diagnosis of high intensity tumors described above.
乳腺磁共振成像如今被视为第三重要的诊断方式。作者研究了51例女性患者中51个肿块病变的T2加权图像（T2WI）信号强度与各种病理结果之间的关系。T2WI在鉴别恶性和良性病变方面效果不佳。视觉上界定的高信号强度区域与坏死、水肿、囊肿及扩张导管等含水量大的病理组织密切相关。低信号强度区域与纤维化、瘢痕和玻璃样变等含水量少的病理组织之间也存在良好相关性。通过肿瘤/脂肪比率测量的信号强度与含水量无关。这可能表明视觉界定的信号强度比测量比率更可靠。总之，可以有把握地说，T2WI是研究乳腺肿瘤继发性改变的良好工具，有助于诊断上述高强度肿瘤。
