Influence of different compressed sensing factors on susceptibility weighted imaging for displaying cerebral medullary vein
10.13929/j.issn.1672-8475.2024.03.003
- VernacularTitle:不同压缩感知因子对磁敏感加权成像显示脑髓静脉的影响
- Author:
Jiajun CAO
1
;
Jing YANG
;
Yukun ZHANG
;
Na LIU
;
Bingbing GAO
;
Yangyingqiu LIU
;
Qingwei SONG
;
Yanwei MIAO
Author Information
1. 大连医科大学附属第一医院放射科,辽宁 大连 116011
- Keywords:
compressed sensing;
magnetic resonance imaging;
cerebral medullary vein;
prospective studies
- From:
Chinese Journal of Interventional Imaging and Therapy
2024;21(3):139-144
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the influence of different acceleration factors(AF)on compressed sensing susceptibility weighted imaging(CS-SWI)for cerebral medullary veins of healthy people,and to screen the best AF.Methods Forty healthy volunteers were prospectively enrolled.Axial brain SWI images were obtained with CS technique under different AF(AF0,CS2,CS4,CS6,CS8 and CS10),and the phase value(PV)and standard deviation(SD)of bilateral septal vein(SV),internal cerebral vein(ICV),thalamus vein(TV),basal vein(BV)and dentate nucleus vein(DNV)were measured.Taken PV and SD of parietal white matter as controls,the signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of venous images were calculated.Then the original images were reconstructed with minimum intensity projection,and the subjective quality scoring of reconstructed images were performed using a 5-point scale.SNR,CNR,PV and quality score were compared among images under different AF,and the best AF,i.e.with the best performances for displaying and quantitatively analyzing cerebral medullary veins in healthy people was obtained.Results Compared with those acquired with AF0,SNR and CNR of all cerebral medullary veins acquired with CS6,CS8 and CS10 were significantly different(all adjusted P＜0.05).Meanwhile,significant differences of PV in bilateral SV and right TV were found among CS6,CS8 and CS10,also in bilateral ICV,left TV and bilateral BV between CS8 and CS10(all adjusted P＜0.05).Conclusion Excessive AF might decrease image quality of CS-SWI for cerebral medullary veins.CS4 was the best AF for displaying and quantitatively analyzing cerebral medullary veins in healthy people.
