A modified saturation‐recovery approximation for multiple spin‐echo pulse sequences

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Abstract
In equations describing multiple spin‐echo pulse sequences, the T1 dependence is often approximated by a saturation‐recovery expression, which is valid only when the repetition time TR is much greater than the time required for the echoes. A slight modification of this approximation greatly increases its accuracy for small TR values. © 1986 Academic Press, Inc.