Ding Ying, Rao Sheng-Xiang, Chen Cai-Zhong, Li Ren-Chen, Zeng Meng-Su
Ying Ding, Sheng-Xiang Rao, Cai-Zhong Chen, Ren-Chen Li, Meng-Su Zeng, Department of Radiology, Zhongshan Hospital of Fudan University, Shanghai Institute of Medical Imaging, Shanghai 200032, China.
World J Gastroenterol. 2015 Apr 28;21(16):5017-22. doi: 10.3748/wjg.v21.i16.5017.
To compare differences between volumetric interpolated breath-hold examination (VIBE) using two-point Dixon fat-water separation (Dixon-VIBE) and chemically selective fat saturation (FS-VIBE) with magnetic resonance imaging examination.
Forty-nine patients were included, who were scanned with two VIBE sequences (Dixon-VIBE and FS-VIBE) in hepatobiliary phase after gadoxetic acid administration. Subjective evaluations including sharpness of tumor, sharpness of vessels, strength and homogeneity of fat suppression, and artifacts that were scored using a 4-point scale. The liver-to-lesion contrast was also calculated and compared.
Dixon-VIBE with water reconstruction had significantly higher subjective scores than FS-VIBE in strength and homogeneity of fat suppression (< 0.0001) but lower scores in sharpness of tumor (P < 0.0001), sharpness of vessels (P = 0.0001), and artifacts (P = 0.034). The liver-to-lesion contrast on Dixon-VIBE images was significantly lower than that on FS-VIBE (16.6% ± 9.4% vs 23.9% ± 12.1%, P = 0.0001).
Dixon-VIBE provides stronger and more homogenous fat suppression than FS-VIBE, while has lower clarity of focal liver lesions in hepatobiliary phase after gadoxetic acid administration.
比较采用两点式狄克逊脂肪-水分离技术的容积内插屏气检查（VIBE）（狄克逊-VIBE）和化学选择性脂肪饱和技术（FS-VIBE）在磁共振成像检查中的差异。
纳入49例患者，在给予钆塞酸后于肝胆期采用两种VIBE序列（狄克逊-VIBE和FS-VIBE）进行扫描。进行主观评估，包括肿瘤清晰度、血管清晰度、脂肪抑制强度和均匀性以及伪影，采用4分制评分。还计算并比较了肝脏与病变的对比度。
在脂肪抑制强度和均匀性方面，水重建的狄克逊-VIBE主观评分显著高于FS-VIBE（<0.0001），但在肿瘤清晰度（P<0.0001）、血管清晰度（P=0.0001）和伪影（P=0.034）方面评分较低。狄克逊-VIBE图像上的肝脏与病变对比度显著低于FS-VIBE（16.6%±9.4%对23.9%±12.1%，P=0.0001）。
狄克逊-VIBE比FS-VIBE提供更强且更均匀的脂肪抑制，而在给予钆塞酸后的肝胆期，局灶性肝病变的清晰度较低。
