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Abstract #4077

Feasibility of Forward and Reversed Preamplifier Decoupling (FPD and RPD) Techniques for a Low Field MRI System at 1 MHz

Sajad Hosseinnezhadian1, Yonghyun Ha1, Kartiga Selvaganesan1, Charles Rogers III1, Baosong Wu1, Gigi Galiana1, and R. Todd Constable1
1Department of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, CT, United States

This study investigated the feasibility of applying forward and reversed preamplifier decoupling techniques for low and high impedance coils, respectively, at 1 MHz. At a low field MRI, e.g. 1 MHz, the choice of components needed for interface circuitry together with availability of preamplifiers with low input impedance is challenging. In this study we demonstrated that using a high impedance coil with a lower number of turns achieved better decoupling levels than that of a low impedance coil. In addition, the minimum requirement for the input resistance of a preamplifier at 1 MHz was investigated.

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