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首页> 外文期刊>Applied Magnetic Resonance >Magnetic resonance imaging of rigid polymers at elevated temperatures with SPRITE
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Magnetic resonance imaging of rigid polymers at elevated temperatures with SPRITE

机译：SPRITE在高温下对刚性聚合物进行磁共振成像

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Magnetic resonance imaging has rarely been applied to rigid polymeric materials, due primarily to the strong dipolar coupling and short signal lifetimes inherent in these materials. SPRITE (single point ramped imaging with T-1 enhancement) (B. J. Balcom, R. P. MacGregor, S. D. Beyea, D. P. Green, R. L. Armstrong, T. W. Bremner: J. Magn. Reson. A 123, 131-134, 1996) is particularly well suited to imaging solid materials. With SPRITE, the only requirement is that T-2* be long enough so that the signal can be phase-encoded. The minimum phase encoding time is limited by the maximum gradient strength available and by the instrument deadtime. At present this is usually tens of microseconds and will only improve with refinements in technology. We have used the SPRITE sequence in conjunction with raising the sample temperature to obtain images of rigid polymers that have largely frustrated conventional imaging methods. This approach provides a straightforward and reliable method for imaging a class of samples that, up until now, have been very difficult to image. [References: 18]
机译：磁共振成像很少用于刚性聚合物材料，这主要是由于这些材料固有的强偶极耦合和短信号寿命。 SPRITE（具有T-1增强的单点倾斜成像）（BJ Balcom，RP MacGregor，SD Beyea，DP Green，RL Armstrong，TW Bremner：J。Magn。Reson。A 123，131-134，1996）特别合适。对固体材料进行成像。使用SPRITE，唯一的要求是T-2 *足够长，以便可以对信号进行相位编码。最小相位编码时间受到最大可用梯度强度和仪器死区时间的限制。目前，这通常是几十微秒，并且只会随着技术的改进而改善。我们将SPRITE序列与提高样品温度结合使用，以获得对传统成像方法大受挫折的刚性聚合物的图像。这种方法提供了一种直接可靠的方法来对一类样品进行成像，到目前为止，这些样品一直很难成像。 [参考：18]

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