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Generalization of t...
Generalization of three-dimensional golden-angle radial acquisition to reduce eddy current artifacts in bSSFP CMR imaging
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- Fyrdahl, A. (author)
- Karolinska Institutet
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Holst, K. (author)
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- Caidahl, Kenneth, 1949 (author)
- Karolinska Institutet,Gothenburg University,Göteborgs universitet,Institutionen för medicin,Institute of Medicine
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- Ugander, M. (author)
- Karolinska Institutet
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- Sigfridsson, A. (author)
- Karolinska Institutet
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(creator_code:org_t)
- 2020-06-26
- 2021
- English.
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In: Magnetic Resonance Materials in Physics Biology and Medicine. - : Springer Science and Business Media LLC. - 0968-5243 .- 1352-8661. ; 34, s. 109-118
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Abstract
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- Purpose We propose a novel generalization of the three-dimensional double-golden-angle profile ordering, which allows for whole-heart volumetric imaging with retrospective binning and reduced eddy current artifacts. Methods A novel theory bridging the gap between the three-dimensional double golden-angle trajectory, and the two-dimensional tiny-golden-angle trajectory is presented. This enables a class of double golden-angle profile orderings with a smaller angular distance between successivek-space readouts. The novel profile orderings were evaluated through simulations, phantom experiments, and in vivo imaging. Comparisons were made to the original double-golden-angle trajectory. Image uniformity and off-resonance sensitivity were evaluated using phantom measurements, and qualitative image quality was assessed using in vivo images acquired in a healthy volunteer. Results The proposed theory successfully reduced the angular step while maintaining image uniformity after binning. Simulations revealed a slow degradation with decreasing angular steps and an increasing number of physiological bins. The phantom images showed a definite improvement in image uniformity and increased robustness to off-resonance, and in vivo imaging corroborated those findings. Conclusion Reducing the angular step in cardio-respiratory-binned golden-angle imaging shows potential for overcoming eddy current-induced image artifacts associated with 3D golden-angle radial imaging.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine (hsv//eng)
Keyword
- Eddy currents
- Golden-angle
- CMR
- reconstruction
- Radiology
- Nuclear Medicine & Medical Imaging
Publication and Content Type
- ref (subject category)
- art (subject category)
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