Improved ability of demonstrating ocular masses on 3.0 T MR scanner combined with an 8-channel eye surface phased array coil: a multi-center study
10.3760/cma.j.cn112149-20220307-00208
- VernacularTitle:3.0 T MR扫描仪联合8通道相控阵眼表面线圈提高眼部肿块显示能力的多中心研究
- Author:
Shijun WANG
1
;
Hong JIANG
;
Feifei WANG
;
Meiyun WANG
;
Guanghui BAI
;
Qinghe HAN
;
Bocheng WANG
;
Jingliang CHENG
;
Chuanliang CHEN
;
Huaizhi GE
;
Qinghai YUAN
;
Xiaofeng TAO
;
Junfang XIAN
Author Information
1. 首都医科大学附属北京同仁医院放射科 首都医科大学眼部肿瘤临床诊疗与研究中心，北京 100730
- Keywords:
Eye;
Magnetic resonance imaging;
Head coil;
Surface coil;
Image quality
- From:
Chinese Journal of Radiology
2023;57(1):41-47
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the value of the 8-channel eye surface phased array coil in improving image quality and demonstrating ocular masses on 3.0 T MR scanner.Methods:From July 2018 to January 2020, the data of orbital MRI in 692 patients with ocular masses on 6 medical centers were prospectively collected. The patients were simple randomly assigned into 8-channel eye surface phased array coil group (413 patients) or 8-channel head phased array coil group (279 patients), with the same MRI sequences. The signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated in orbital anatomy structures and masses (eyelid mass, intraocular mass, lacrimal mass and orbital mass). The image quality scores including motion artifact, mass margin, the relationship between the mass and adjacent structures, and overall image quality were recorded. The differences of image quality between the two groups were compared by two independent sample t-test or Wilcoxon rank test. Results:The SNR and CNR were higher in eye surface coil group than those in head coil group ( P<0.05). The scores of ocular movement artifacts were higher in head coil group than those in surface coil group ( P<0.05). The scores of intraocular mass margin, the relationship between the mass and adjacent structures, and overall image quality were higher in surface coil group than those in head coil group ( P<0.001). There were no significant differences in mass margin, the relationship between the mass and adjacent structures, and overall image quality scores of eyelid, lacrimal gland, and orbital mass between the two groups ( P>0.05). Conclusion:3.0 T MR scanner combined with the 8-channel eye surface phased array coil can improve the SNR and CNR of orbital MR images, the demonstration of the intraocular mass margin and the relationship between the mass and adjacent structures.
