Matsuoka Aoi, Minato Masako, Harada Masafumi, Kubo Hitoshi, Bandou Yoshikatsu, Tangoku Akira, Nakano Kiichirou, Nishitani Hiromu
Nishitani Department of Radiology, School of Medicine, The University of Tokushima, 3-18-15 Kuramoto-cho, Tokushima 770-8509, Japan.
Radiat Med. 2008 Jan;26(1):15-20. doi: 10.1007/s11604-007-0187-6. Epub 2008 Jan 31.
The aim of this study was to compare diffusion-weighted imaging (DWI) at 3.0 T and 1.5 T by evaluating the apparent diffusion coefficient (ADC) value and visibility of breast cancer in the same patients.
A total of 13 patients (16 lesions) with breast cancer underwent DWI at 3.0 T and 1.5 T. Tumors were classified into two groups based on the lesion size. The ADC values were measured, and visibility of the tumors was scored blindly.
No significant difference was found for ADC values between 3.0 T and 1.5 T in either group (P > 0.05). All of the large lesions were visible clearly at both magnetic field strengths, and image scores were not different (P > 0.05). In contrast, small lesions were more clearly visible and had better image scores at 3.0 T than at 1.5 T (P < 0.001).
Small cancers were more clearly visible on DWI at 3.0 T than 1.5 T.
本研究旨在通过评估同一患者乳腺癌的表观扩散系数（ADC）值和可视性，比较3.0 T和1.5 T磁共振扩散加权成像（DWI）。
13例（16个病灶）乳腺癌患者分别接受3.0 T和1.5 T的DWI检查。根据病灶大小将肿瘤分为两组。测量ADC值，并对肿瘤可视性进行盲法评分。
两组中3.0 T和1.5 T的ADC值均无显著差异（P>0.05）。所有大病灶在两种磁场强度下均清晰可见，图像评分无差异（P>0.05）。相比之下，小病灶在3.0 T时比在1.5 T时更清晰可见，图像评分更高（P<0.001）。
在DWI上，3.0 T时小癌灶比1.5 T时更清晰可见。
