Initial practice on cross-talk tests for MRI scanners
10.13929/j.1003-3289.201706055
- VernacularTitle:对MRI设备层间射频信号干扰进行检测的实践
- Author:
Hongxia YIN
1
;
Yawen LIU
;
Pingping YANG
;
Yi ZHANG
;
Jianming ZHU
;
Zhenghan YANG
;
Zhenchang WANG
Author Information
1. 首都医科大学附属北京友谊医院放射科
- Keywords:
Cross-talk;
Quality control;
Magnetic resonance imaging
- From:
Chinese Journal of Medical Imaging Technology
2017;33(11):1607-1610
- CountryChina
- Language:Chinese
-
Abstract:
Objective To detect the cross-talk RF signal interference of three MRI scanners,in order to deepen the understanding of cross-talk RF signal interference.Methods Three different GE magnetic resonance imaging scanners (GE 1.5T HDi,installation time:2012;GE 3.0T HD,installation time:2006;GE 3.0T 750W,installation time:2016) were tested.The axial T1-weighted sequence was used to scan ACR phantom.Slice gaps with 5.0 mm,1.0 mm,0.5 mm and 0 were performed,respectively.SNR values were also recorded.Based on the results,the percentage change charts of SNR with slice gaps were made.Test standard was set as SNR decreased less than 20 ％ when the slice gap reduced from 5 mm to 0.Results When slice gap was reduced from 5 mm to 0,SNRs for three scanners decreased by 18.16 ％,23.57％ and 10.75％,respectively.Both the results of cross-talk obtained with GE 1.5T HDi and GE 3.0T 750W scanner met the test standard,while the result obtained with GE 3.0T HD (used for more than 10 years) was below the standard.Conclusion The cross-talk RF signal interference still exists for three MRI scanners.The test result of the scanner used for the longest time is unqualified.The quality control test of cross-talk should be done in the daily work.
