The influence of phase coding on streaking artifact of Star-volumetric interpolated body examination sequence
10.3969/j.issn.1002-1671.2025.05.031
- VernacularTitle:相位编码对Star-容积插值体部扫描序列条纹伪影的影响
- Author:
Jun LIU
1
;
Jianwei WANG
;
Lulu XU
;
Hai XU
;
Zhisheng LIN
;
Liya JI
Author Information
1. 南京医科大学第一附属医院放射科,江苏 南京 210029
- Publication Type:Journal Article
- Keywords:
phase coding;
volumetric interpolated body examination;
magnetic resonance imaging
- From:
Journal of Practical Radiology
2025;41(5):857-860
- CountryChina
- Language:Chinese
-
Abstract:
Objective To discuss the mechanism of the streaking artifact of Star-volumetric interpolated body examination(Star-VIBE)sequence and the influence of phase coding on it.Methods Twenty-six volunteers underwent many times Star-VIBE sequences scanning with different phase coding(320,640,960,1 280,1 600).The severity of streaking artifact of images in different phase cod-ing groups was evaluated qualitatively.The signal-to-noise ratio(SNR)of muscle,thyroid and contrast-enhanced artery,contrast-to-noise ratio(CNR)between soft tissues,and CNR between muscle and contrast-enhanced artery of the images in different phase coding groups were evaluated quantitatively.Results In qualitative evaluation,with the number of phase coding increased,the streaking artifact decreased(H=83.022,P＜0.005).In quantitative evaluation,SNRmuscle,SNRthyroid,SNRcontrast-enhanced artery and CNRcontrast-enhanced gradually increased with the increase of phase coding number(SNRmuscle:F=6.913,P＜0.005;SNRthyroid:F=3.930,P=0.005;SNRcontrast-enhanced artery:F=6.980,P＜0.005;CNRcontrast-enhanced:F=6.482,P＜0.005),while CNRsoft tissue showed no statistical difference(F=1.114,P=0.339).Conclusion There is streaking artifact on the image of the Star-VIBE sequence,which can be reduced by increas-ing the number of phase coding appropriately.The most suitable phase coding is 960.
