Ishizaka Kinya, Kato Fumi, Terae Satoshi, Mito Suzuko, Oyama-Manabe Noriko, Kamishima Tamotsu, Nakanishi Mitsuhiro, Sugimori Hiroyuki, Hamaguchi Hiroyuki, Shirato Hiroki
Department of Radiological Technology, Hokkaido University Hospital, N14 W5, Kita-ku, Sapporo, 060-8648, Japan,
Radiol Phys Technol. 2015 Jan;8(1):4-12. doi: 10.1007/s12194-014-0278-x. Epub 2014 Jun 26.
In this study, we aimed to compare fat-suppression homogeneity on breast MR imaging by using dual-source parallel radiofrequency excitation and image-based shimming (DS-IBS) with single-source radiofrequency excitation with volume shim (SS-Vol) at 3 Tesla. Twenty patients were included. Axial three-dimensional T1-weighted turbo-field-echo breast images with DS-IBS and SS-Vol were obtained. Fat suppression was scored with four grade points. The contrast of the pectoral muscle and the fat in each breast area was obtained in the head medial, head lateral, foot medial, and foot lateral areas. The axillary space was calculated and compared between DS-IBS and SS-Vol. The average DS-IBS score was significantly higher than that of SS-Vol. The mean contrasts of fat in the foot lateral areas and axillary spaces on DS-IBS images were significantly higher than on SS-Vol images.
在本研究中，我们旨在比较在3特斯拉场强下，使用双源并行射频激励和基于图像的匀场技术（DS-IBS）与单源射频激励结合容积匀场技术（SS-Vol）进行乳腺磁共振成像时的脂肪抑制均匀性。纳入了20例患者。获取了采用DS-IBS和SS-Vol技术的轴向三维T1加权涡轮场回波乳腺图像。脂肪抑制采用四级评分。在乳腺的头内侧、头外侧、足内侧和足外侧区域获取胸肌与脂肪的对比度。计算并比较DS-IBS和SS-Vol技术下腋窝间隙的情况。DS-IBS的平均评分显著高于SS-Vol。DS-IBS图像上足外侧区域脂肪和腋窝间隙的平均对比度显著高于SS-Vol图像。
