A new approach for joint estimation of local magnitude, decay, and frequency from single-shot MRI

Weidong Tang; Stanley J. Reeves; Donald B. Twieg

doi:10.1117/12.774013

20 March 2008 A new approach for joint estimation of local magnitude, decay, and frequency from single-shot MRI

Weidong Tang, Stanley J. Reeves, Donald B. Twieg

Proceedings Volume 6814, Computational Imaging VI; 68140C (2008) https://doi.org/10.1117/12.774013
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

By omitting local decay and phase evolution, traditional MRI models each datum as a sample from k-space so that reconstruction can be implemented by FFTs. Single-shot parameter assessment by retrieval from signal encoding (SS-PARSE) acknowledges local decay and phase evolution, so it models each datum as a sample from (k, t)-space rather than k-space. Local decay and frequency vary continuously in space. Because of this, discrete models in space can cause artifacts in the reconstructed parameters. Increasing the resolution of the reconstructed parameters can more accurately capture the spatial variations, but the resolution is limited not only by computational complexity but also by the size of the acquired data. For a limited data set used for reconstruction, simply increasing the resolution may cause the reconstruction to become an underdetermined problem. This paper presents a solution to this problem based on cubic convolution interpolation.

Citation Download Citation

Weidong Tang, Stanley J. Reeves, and Donald B. Twieg "A new approach for joint estimation of local magnitude, decay, and frequency from single-shot MRI", Proc. SPIE 6814, Computational Imaging VI, 68140C (20 March 2008); https://doi.org/10.1117/12.774013

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