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A bridged loop gap resonator (BLGR) for small animal imaging by 1.5 T MRI systems
- Source :
- Review of Scientific Instruments. 91:033704
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- A bridged loop gap resonator (BLGR) was developed as a transmit and receive coil for a mobile insert to be used for small animal proton imaging by 1.5 T MRI devices. The insert system has its own gradient system, radio frequency (RF) transmit and receive coil, and control and signal processing unit. The reflection S11 and transmission S21 parameters, quality factor (Q), sensitivity, signal to noise ratio (SNR), and maps of the static (B0) and RF (B1) magnetic flux densities were measured. The RF coil was developed starting from a loop gap resonator (LGR) for a balanced LGR and a shielded balanced LGR for a shielded bridged balanced LGR. The purpose of developing this device is to minimize the influence of the sample and surroundings on the RF coil parameters. The final design of the BLGR does not require retuning after a sample change. A 3D image of a mouse in formalin was acquired with a fast low angle shot (FLASH) MRI sequence. The SNR was calculated from one FLASH image. The signal for SNR calculation was acquired from a gadolinium-doped water sample and the noise from the air outside of the sample. This article verifies that the BLGR is viable for small animal nuclear magnetic resonance imaging at 1.5 T and is independent of sample size and material.
- Subjects :
- 010302 applied physics
Physics
Signal processing
Phantoms, Imaging
business.industry
Equipment Design
Signal-To-Noise Ratio
Magnetic Resonance Imaging
01 natural sciences
Noise (electronics)
Signal
010305 fluids & plasmas
Mice
Optics
Signal-to-noise ratio (imaging)
Electromagnetic coil
0103 physical sciences
Animals
Radio frequency
business
Instrumentation
Sensitivity (electronics)
Radiofrequency coil
Subjects
Details
- ISSN :
- 10897623 and 00346748
- Volume :
- 91
- Database :
- OpenAIRE
- Journal :
- Review of Scientific Instruments
- Accession number :
- edsair.doi.dedup.....961a3e1ecf3ed267a9b7e1a819dac9ff