Investigation and practice of magnetic field homogeneity evaluation methods for MRI equipment
10.13929/j.1003-3289.201706073
- VernacularTitle:MRI设备磁场均匀性评估方法探讨及实践
- Author:
Pingping YANG
1
;
Hongxia YIN
;
Yawen LIU
;
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:
Magnetic field homogeneity;
Magnetic resonance spectroscopy;
Bandwidth difference
- From:Chinese Journal of Medical Imaging Technology
2017;33(11):1611-1614
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the evaluation methods of magnetic field uniformity and the practical operations,in order to provide references for clinical quality control.Methods Based on MRS phantom and 32 cm uniform spherical phantom,the evaluation methods of magnetic field uniformity were used to detect MRI equipment in department of radiology,including spectral peak and the bandwidth difference.Results The full width at half maximum (FWHM) of MRS phantom was 0.08 ppm,the inhomogeneity values on coronal,sagittal and axial detected by the bandwidth difference method was 0.15 ppm,0.08 ppm and 0.18 ppm,respectively.Conclusion The magnetic field homogeneity of the above mentioned MRI equipment is favorable,which accords with magnetic field uniformity detection standard.
