Читать книгу Magnetic Resonance Microscopy - Группа авторов - Страница 66

While a suitably compact magnet design constitutes one of the primary challenges to achieving the easy-to-site suite, portable brain MRI, or MR brain monitor discussed, additional technical challenges arise as the system deviates from the canonical high-field system design. Issues include trying to image in a more inhomogeneous field and trying to operate an MRI scanner without the “shielded room” Faraday cage that attenuates external EMI. As mentioned earlier, relaxing the homogeneity constraint benefits compact magnet design and eliminating the shielded room requires an alternative passive or active EMI mitigation strategy.