002629

2019-07-30 09:53  下载量：0

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Electromagnets are used extensively in MR systems—hyperpolarized gas, prepolarized, and other low field imaging systems often use electromagnets for the main field, and conventional superconducting systems commonly use electromagnets for the shim and gradient coils. The field produced by an electromagnet is only as temporally stable as the current supply that powers it. The steady state accuracy of a current supply is fundamentally limited by noise and long-term drift of the control electronics, and the accuracy of a current supply subject to transient demands of a system, such as our Prepolarized MRI system, is fundamentally limited by the dynamic response of the coil itself.

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天津多为莱博科技有限公司
铜牌会员 | 第6年
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