Abstract

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Title:: Application of variable flip angle HASTE sequence in abdominal examination

Author(s):: ZHANG Hui; FENG Fei; SHAN Huiming; ZHOU Wen; QI Yulong; LI Zhonghua; Department of Medical Imaging, Peking University Shenzhen Hospital, Shenzhen 518036, China

Keywords:: ; Keywords: abdomen; magnetic resonance imaging; variable flip angle; half-Fourier acquisition single-shot turbo spin-echo

Abstract:: Abstract: Objective To evaluate the application value of variable flip angle half-Fourier acquisition single-shot turbo spin-echo (vfl HASTE) sequence in abdominal examination. Methods A total of 78 patients who needed abdominal examination were enrolled in this study. The coronary and axial scans were performed on the patients by traditional HASTE sequence and vfl HASTE sequence. The signal-to-noise ratios and contrast-to-noise ratios of liver tissues and intrahepatic lesions which were obtained by two different kinds of sequences were evaluated. Moreover, the clarity and artifact of the two kinds of images were evaluated by two radiologists. Results All the examinations were successfully completed. There was no difference in the signal-to-noise ratio of liver tissues and intrahepatic lesions and the contrast-to-noise ratio of liver and spleen between images obtained with vfl HASTE sequence and those obtained with traditional HASTE sequence (P>0.05). However, compared with the images obtained with traditional HASTE sequence, those obtained with vfl HASTE sequence not only had higher sharpness, fewer artifacts, but also displayed tissues and lesions more clearly (P<0.05). Conclusion vfl HASTE sequence which reduces the fuzzy artifacts in the traditional HASTE sequence and displays soft tissues and lesions more clearly is more valuable in abdominal examination.