|Table of Contents|

 Effects of readout-segmented echo-planar imaging sequence on the quality of diffusion-weighted imaging in cervical cancer(PDF)

《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

Issue:
2019年第6期
Page:
705-709
Research Field:
医学影像物理
Publishing date:

Info

Title:
 Effects of readout-segmented echo-planar imaging sequence on the quality of diffusion-weighted imaging in cervical cancer
Author(s):
 LI Peng1 LIANG Haoran2 YANG Xu1 ZHAO Hongbo1
 1. Department of Imaging Diagnosis, Xi’an Medical University, Xi’an 710021, China; 2. Department of Imaging, the Nuclear Industry 215 Hospital of Shaanxi Province, Xianyang 712021, China
Keywords:
 Keywords: cervical cancer readout-segmented echo-planar imaging single-shot echo-planar imaging diffusion-weighted imaging
PACS:
R737.3
DOI:
DOI:10.3969/j.issn.1005-202X.2019.06.017
Abstract:
 Abstract: Objective To investigate the effects of readout-segmented echo-planar imaging (RS-EPI) sequence on the quality of diffusion-weighted imaging (DWI) in cervical cancer. Methods A total of 92 patients with cervical cancer admitted from May 2015 to May 2018 were enrolled in this study. All patients received magnetic resonance imaging. Single-shot echo-planar imaging (SS-EPI) sequence and RS-EPI sequence were adopted. SS-EPI sequence was divided into conventional SS-EPI sequence and high-resolution SS-EPI sequence. The DWI image qualities of 3 kinds of scanning sequences were observed, and the deformability, clarity, spatial resolution and diagnostic confidence of 3 scanning sequences were compared. The left-right diameters, front-back diameters and area measurements of 3 scanning sequences were recorded. Moreover, the contrast-to-noise ratio, contrast and signal-to-noise ratio of semi-quantitative images were calculated. Results RS-EPI sequence was superior to conventional and high-resolution SS-EPI sequences in deformability, clarity, spatial resolution and diagnostic confidence. Besides, the scores of high-resolution SS-EPI sequence were significantly higher than those of conventional SS-EPI sequence (P<0.05), except for deformability. No statistical differences were found in left-right diameter, front-back diameter and area among 3 scanning sequences (P>0.05). The contrast-to-noise ratio and contrast of RS-EPI sequence were lower than those of conventional and high-resolution SS-EPI sequences, and the signal-to-noise ratio was higher than that of conventional and high-resolution SS-EPI sequences (P<0.05). Conclusion Compared with conventional and high-resolution SS-EPI sequences, RS-EPI sequence not only achieves a higher image quality, but also reduces artifacts and distortions.

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Last Update: 2019-06-25