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MAGNETIC RESONANCE IMAGING DEVICE, MAGNETIC RESONANCE IMAGING SYSTEM, AND PARAMETER ESTIMATION METHOD
MAGNETIC RESONANCE IMAGING DEVICE, MAGNETIC RESONANCE IMAGING SYSTEM, AND PARAMETER ESTIMATION METHOD
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机译:磁共振成像装置,磁共振成像系统和参数估计方法
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摘要
In a case where a subject parameter distribution is obtained using MRI, a magnetization transfer effect is suppressed such that the calculation accuracy of T1 and T2 of brain parenchyma can be improved and a variation in the T1 value of blood caused by the effect of blood flow can be reduced. In imaging for parameter estimation, a magnetization transfer effect is suppressed by using a high frequency magnetic field pulse having a narrow frequency band as an excitation pulse. In a case where the frequency band is narrow, the high frequency magnetic field pulse has a shape in which the excitation profile is similar to a Gaussian function. A rising portion of the shape is arranged in a field of view where the head is an imaging target.
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