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.
Last Update: 2019-06-25