Four-dimensional spectral-spatial imaging using projection reconstruction |
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Authors: | Hyslop W B Woods R K Lauterbur P C |
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Affiliation: | Biomed. Magnetic Resonance Lab., Illinois Univ., Urbana, IL. |
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Abstract: | An n-dimensional (n-D) filtered backprojection image reconstruction algorithm has been developed and used in the reconstruction of 4-D spectral-spatial magnetic resonance imaging (MRI) data. The algorithm uses n-1 successive stages of 2-D filtered backprojection to reconstruct an n-D image. This approach results in a reduction in computational time on the order of N(n-2) relative to the single-stage technique, where N(n) is the number of elements in an n-D image. The authors describe implementation of the algorithm, including digital filtering and sampling requirements. Images obtained from simulated data are presented to illustrate the accuracy and potential utility of the technique. |
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