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Spectrally weighted twisted projection imaging: Reducing T 2 signal attenuation effects in fast three‐dimensional sodium imaging
Author(s) -
Boada Fernando E.,
Shen Gary X.,
Chang Sam Y.,
Thulborn Keith R.
Publication year - 1997
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910380624
Subject(s) - attenuation , signal (programming language) , weighting , reduction (mathematics) , projection (relational algebra) , signal to noise ratio (imaging) , point spread function , noise reduction , distortion (music) , physics , optics , point (geometry) , resolution (logic) , noise (video) , image resolution , mathematics , computer science , image (mathematics) , algorithm , acoustics , computer vision , artificial intelligence , telecommunications , bandwidth (computing) , amplifier , geometry , programming language
Abstract A scheme for the reduction of T 2 signal attenuation effects in three‐dimensional twisted projection imaging is presented. By purposely reducing the sample density at the high spatial frequencies, a considerable reduction in readout time is achieved. The reduction in readout time leads to decreased T 2 signal attenuation which translates into improved signal‐to‐noise ratio (SNR). The SNR improvement is achieved without decreasing the image's resolution since the point spread function depends on the sample weighting as well as the T 2 attenuation. The results indicate that SNR improvements of up to 40% can be achieved using the proposed scheme.