Parametric Amplification of Magnetic Resonance Images

Syms R.R.A.

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Parametric Amplification of Magnetic Resonance Images

机译：磁共振图像的参数放大

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Parametric amplification is considered as a method for the detection of magnetic resonance imaging (MRI) signals. The theory of three-frequency amplifiers is reviewed, and aspects relevant to radio-frequency detection are highlighted. The modifications needed for MRI are described, and a parametrically amplified surface coil for 63.85 MHz operation is demonstrated. Electrical characterization is carried out, and good agreement is obtained with the theory. A linear gain of 100 (40 dB power gain) and a Q-factor of 18 000 are demonstrated. 1H MRI is carried out at 1.5 T and frequency-domain filtering of images is demonstrated.

机译：参数放大被认为是用于检测磁共振成像（MRI）信号的方法。回顾了三频放大器的原理，并着重介绍了与射频检测有关的方面。描述了MRI所需的修改，并演示了用于63.85 MHz操作的参数放大的表面线圈。进行了电气表征，并与理论取得了良好的一致性。线性增益为100（功率增益为40 dB），Q因子为18 000。在1.5 T下进行 1 H MRI，并证明了图像的频域滤波。

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《Sensors Journal, IEEE》 |2012年第6期|p.1836-1845|共10页
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Syms R.R.A.;
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Parametric Amplification of Magnetic Resonance Images

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