Radiofrequency Coil Design for in vivo Sodium Magnetic Resonance Imaging of Mouse Kidney at 9.4T
10.13104/imri.2018.22.1.65
- Author:
Song I LIM
1
;
Chul Woong WOO
;
Sang Tae KIM
;
Bo Young CHOE
;
Dong Cheol WOO
Author Information
1. Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. dcwoo@amc.seoul.kr
- Publication Type:Original Article
- Keywords:
Sodium imaging;
Magnetic resonance imaging;
Kidney;
RF coil
- MeSH:
Animals;
Humans;
Kidney;
Magnetic Resonance Imaging;
Mice;
Signal-To-Noise Ratio;
Sodium
- From:Investigative Magnetic Resonance Imaging
2018;22(1):65-70
- CountryRepublic of Korea
- Language:English
-
Abstract:
The objective of this study was to describe a radiofrequency (RF) coil design for in vivo sodium magnetic resonance imaging (MRI) for use in small animals. Accumulating evidence has indicated the importance and potential of sodium imaging with improved magnet strength (> 7T), faster gradient, better hardware, multi-nucleus imaging methods, and optimal coil design for patient and animal studies. Thus, we developed a saddle-shaped sodium volume coil with a diameter/length of 30/30 mm. To evaluate the efficiency of this coil, bench-level measurement was performed. Unloaded Q value, loaded Q value, and ratio of these two values were estimated to be 352.8, 211.18, and 1.67, respectively. Thereafter, in vivo acquisition of sodium images was performed using normal mice (12 weeks old; n = 5) with a two-dimensional gradient echo sequence and minimized echo time to increase spatial resolution of images. Sodium signal-to-noise ratio in mouse kidneys (renal cortex, medulla, and pelvis) was measured. We successfully acquired sodium MR images of the mouse kidney with high spatial resolution (approximately 0.625 mm) through a combination of sodium-proton coils.
