SPI/SPRITE imaging

STRAFI and SPI/SPRITE imaging of nuclei other than H... 

The SPRITE [16] technique was developed to reduce the dangerous mechanical vibrations and noise produced during an SPI experiment. In addition to the reduced noise and mechanical vibration, the experiment is much faster than SPI and the image intensity is still easily understood. However, one experimental shortcoming is a magnetic field gradient duty cycle which is even more demanding than an SPI experiment. 

The SPRITE signal equation is identical to Eq. (3.4.1) and it is possible to acquire density weighted images in the same manner as an SPI experiment. The TR in a SPRITE experiment is only a few milliseconds, which is similar to the Tj of a concrete specimen. Therefore to remove this influence from the image, a can be... 

The SPI and SPRITE class of measurements for imaging short MR signal lifetimes are quantitative and have signal equations that are readily understood. The centric SPRITE methods are much faster and feature signal equations that are easier to interpret. This feature makes these measurements more readily density weighted and better suited to imaging quadrupolar nuclei. 

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