A Calibration and Compensation Method for Dynamic Range Recovery of Low-Power SiGe Pre-Amplifiers.

作者：Christopher Vassos, Fraser Robb, Shreyas Vasanawala, John M. Pauly, Greig Scott · 发表于：Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 年份：2023 · DOI：10.58530/2022/2000 · 研究领域：Advanced MRI Techniques and Applications、Ultrasound Imaging and Elastography、Ultrasound and Hyperthermia Applications

Power consumption reduction is key when exploring wireless MRI arrays. An alternative low-power (5.7mW) SiGe pre-amplifier is presented and its impact on imaging performance evaluated in a benchtop setting. The reduction in power results in a more extreme non-linearity that introduces distortion into the images. It is possible to calibrate and compensate for this distortion through receive-only methods. Applying this compensation to the distorted images results in a restoration of image quality with resulting RMSE comparable to industry standard amplifiers representing a potential power reduction up to 30x.