用于7 T动物磁共振成像的多通道MOSFET射频传输系统的实用设计

IF 0.9 4区医学 Q4 CHEMISTRY, PHYSICAL Concepts in Magnetic Resonance Part B-Magnetic Resonance Engineering Pub Date : 2015-10-23 DOI:10.1002/cmr.b.21313

Yizhe Zhang, Yan Liu, Bingyao Sun, Xiaoliang Zhang, Xiaohua Jiang

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引用次数: 2

摘要

在这项工作中，我们开发并测试了一种多通道射频(RF)传输系统，该系统具有紧凑型金属氧化物半导体场效应晶体管(MOSFET)放大器，用于7 T动物MRI扫描仪的并联激励。该系统由一个多通道射频控制器和四个独立的射频功率放大器组成。每个功率放大器包含两个放大级。通过仿真和台架试验验证了设计的正确性。该放大器在300 MHz时的功率增益为18.7 dB，证明了该传输系统在7 t时对小型动物并联激励应用具有足够的放大能力。该紧凑型射频功率放大器可用于多通道射频阵列系统的线圈放大。©2015 Wiley期刊公司工程机械学报(自然科学版)，第1期，第2 - 3节，2015

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Practical design of multi-channel MOSFET RF transmission system for 7 T animal MR imaging

In this work, we developed and tested a multi-channel radio frequency (RF) transmission system with compact metal-oxide semiconductor field effect transistor (MOSFET) amplifiers for parallel excitation in 7 T animal MRI scanner. The system is composed of a multi-channel RF controller and four independent RF power amplifiers. Each power amplifier contains two amplification stages. The design was validated by simulation and bench test. The power gain for the amplifier is 18.7 dB at 300 MHz, demonstrating the sufficient amplification capability of the transmission system for small animal parallel excitation applications at 7 T. This compact RF power amplifier can be potentially used for on-coil amplification in multichannel RF array system. © 2015 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 45B: 191–200, 2015

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来源期刊

Concepts in Magnetic Resonance Part B-Magnetic Resonance Engineering 物理-光谱学

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Concepts in Magnetic Resonance Part B brings together engineers and physicists involved in the design and development of hardware and software employed in magnetic resonance techniques. The journal welcomes contributions predominantly from the fields of magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR), but also encourages submissions relating to less common magnetic resonance imaging and analytical methods. Contributors come from both academia and industry, to report the latest advancements in the development of instrumentation and computer programming to underpin medical, non-medical, and analytical magnetic resonance techniques.