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Reduction of artifacts by optimization of the sensitivity map in sensitivity-encoded spectroscopic imaging

✍ Scribed by Xiaoli Zhao; Robert W. Prost; Zhu Li; Shi-Jiang Li

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
173 KB
Volume
53
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Sensitivity‐encoded spectroscopic imaging (SENSE‐SI) reduces scanning time by using multiple coils for parallel signal acquisition. Significant artifacts could be induced by SENSE‐SI, mainly due to the low‐resolution nature of spectroscopic imaging. The present study introduces a novel method to reduce the artifacts. High‐resolution sensitivity maps are used in low‐resolution SENSE reconstruction. An intermediate unaliased image is obtained after SENSE reconstruction. Based on the intermediate image, the sensitivity maps are optimized and then the SENSE reconstruction is performed again. The final unaliased image has significantly reduced artifacts. Magn Reson Med 53:30–34, 2005. © 2004 Wiley‐Liss, Inc.

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