Initial practice on quality control tests and action limits setting of birdcage head coils
10.13929/j.1003-3289.201706053
- VernacularTitle:正交鸟笼头线圈质量控制检测与建立处置界限的初步实践
- Author:
Hongxia YIN
1
;
Yawen LIU
;
Pingping YANG
;
Mingzhe NIU
;
Jianming ZHU
;
Zhenchang WANG
;
Zhenghan YANG
Author Information
1. 首都医科大学附属北京友谊医院放射科
- Keywords:
Coils;
Quality control;
Magnetic resonance imaging;
Performance evaluation
- From:
Chinese Journal of Medical Imaging Technology
2018;34(1):123-127
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish clinical quality control method with testing the birdcage head coils and setting up the action limits.Methods Three different MR devices (GE 1.5T HDi,GE 3.0T HD and GE 3.0T 750W) and corresponding birdcage coils were tested.Axial T1WI was performed to scan ACR phantom.SNR,percent image uniformity (PIU) and percent signal ghosting (PSG) were measured for six times,and the mean values and standard deviations (SD) were calculated.Based on the results,the action limits for each parameter were set.Results The mean value of SNR for the three devices was 262.14,280.47 and 474.24,and SD was 18.43,29.67 and 29.95,respectively;the action limits were ≥225.28,≥221.13 and ≥414.34,respectively;the mean value of PIU for the three devices was 95.00％,83.17％ and 84.33％,SD was 0.63％,1.17％ and 0.82％,respectively;the action limits were ≥93.74％,≥82.00％ (corrected) and ≥82.69％,respectively.The mean value of PSG for the three devices was 0.11％,0.07％ and 0.14％,SD was 0.12％,0.03％ and 0.11％,respectively;the action limits were ≤0.35％,≤0.13％ and ≤0.36％,respectively.Conclusion All of SNR,PIU and PSG for three MR devices were consistent with the action limits in this study.
