Zhou J, Mori S, van Zijl P C
Johns Hopkins University Medical School, Department of Radiology, Baltimore, Maryland 21205-2195, USA.
Magn Reson Med. 1998 Nov;40(5):712-9. doi: 10.1002/mrm.1910400511.
It is shown that the flow-sensitive alternating inversion recovery (FAIR) technique is complicated by the effect of radiation damping, leading to problems in calibrating this method on phantoms and to inaccuracies in measured flows. A modified scheme called FAIRER (FAIR excluding radiation damping) is proposed, which suppresses the damping effects by employing very weak magnetic field gradients (0.06 G/cm) during the inversion recovery, spin-echo, and predelay periods. Results on phantoms and in vivo on cat brain are presented that demonstrate that FAIRER effectively solves these problems.
研究表明，血流敏感型交替反转恢复（FAIR）技术受辐射阻尼效应的影响而变得复杂，这导致在体模上校准该方法时出现问题，并使测量血流产生误差。提出了一种名为FAIRER（排除辐射阻尼的FAIR）的改进方案，该方案在反转恢复、自旋回波和预延迟期间采用非常弱的磁场梯度（0.06 G/cm）来抑制阻尼效应。文中给出了体模和猫脑活体实验的结果，这些结果表明FAIRER有效地解决了这些问题。
