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MOTION-ROBUST TRANSMIT RADIO FREQUENCY FIELD MAPPING IN MAGNETIC RESONANCE IMAGING USING INTERLEAVED BLOCH-SIEGERT SHIFTING
MOTION-ROBUST TRANSMIT RADIO FREQUENCY FIELD MAPPING IN MAGNETIC RESONANCE IMAGING USING INTERLEAVED BLOCH-SIEGERT SHIFTING
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机译:交错Bloch-Siegert变换在磁共振成像中的运动-鲁棒传输无线电频率场映射
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摘要
Systems and methods for mapping the transmit sensitivity of one or more radio frequency (“RF”) coils for use in magnetic resonance imaging (“MRI”) are described. The transmit RF field (“B1+”) for an RF coil, or an array of RF coils, is mapped using a robust, motion-insensitive technique that implements Bloch-Siegert shifts performed with interleaved positive and negative off-resonance shifts. The motion insensitivity of this technique makes it particularly useful for applications where there is significant motion, such as cardiac imaging, in which previous B1+ mapping techniques are not as accurate or effective.
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