Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects
Phase-contrast MRI (PC-MRI) velocimetry is a noninvasive, high-resolution motion assessment tool. However, high motion sensitivity requires strong motion-encoding magnetic gradients, making phase-contrast-MRI prone to baseline shift artifacts due to the generation of eddy currents. In this study, we...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
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2013
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| _version_ | 1797062818318516224 |
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| author | Espe, E Espe, E Aronsen, J Aronsen, J Aronsen, J Skrbic, B Skrbic, B Skulberg, V Schneider, J Sejersted, O Sejersted, O Zhang, L Zhang, L Sjaastad, I Sjaastad, I |
| author_facet | Espe, E Espe, E Aronsen, J Aronsen, J Aronsen, J Skrbic, B Skrbic, B Skulberg, V Schneider, J Sejersted, O Sejersted, O Zhang, L Zhang, L Sjaastad, I Sjaastad, I |
| author_sort | Espe, E |
| collection | OXFORD |
| description | Phase-contrast MRI (PC-MRI) velocimetry is a noninvasive, high-resolution motion assessment tool. However, high motion sensitivity requires strong motion-encoding magnetic gradients, making phase-contrast-MRI prone to baseline shift artifacts due to the generation of eddy currents. In this study, we propose a novel nine-point balanced velocity-encoding strategy, designed to be more accurate in the presence of strong and rapidly changing gradients. The proposed method was validated using a rotating phantom, and its robustness and precision were explored and compared with established approaches through computer simulations and in vivo experiments. Computer simulations yielded a 39-57% improvement in velocity-noise ratio (corresponding to a 27-33% reduction in measurement error), depending on which method was used for comparison. Moreover, in vivo experiments confirmed this by demonstrating a 26-53% reduction in accumulated velocity error over the R-R interval. The nine-point balanced phase-contrast-MRI-encoding strategy is likely useful for settings where high spatial and temporal resolution and/or high motion sensitivity is required, such as in high-resolution rodent myocardial tissue phase mapping. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc. Copyright © 2012 Wiley Periodicals, Inc. |
| first_indexed | 2024-03-06T20:51:01Z |
| format | Journal article |
| id | oxford-uuid:37928744-1eef-4166-ad52-59f11a804f9b |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:51:01Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:37928744-1eef-4166-ad52-59f11a804f9b2022-03-26T13:44:51ZImproved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effectsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:37928744-1eef-4166-ad52-59f11a804f9bSymplectic Elements at Oxford2013Espe, EEspe, EAronsen, JAronsen, JAronsen, JSkrbic, BSkrbic, BSkulberg, VSchneider, JSejersted, OSejersted, OZhang, LZhang, LSjaastad, ISjaastad, IPhase-contrast MRI (PC-MRI) velocimetry is a noninvasive, high-resolution motion assessment tool. However, high motion sensitivity requires strong motion-encoding magnetic gradients, making phase-contrast-MRI prone to baseline shift artifacts due to the generation of eddy currents. In this study, we propose a novel nine-point balanced velocity-encoding strategy, designed to be more accurate in the presence of strong and rapidly changing gradients. The proposed method was validated using a rotating phantom, and its robustness and precision were explored and compared with established approaches through computer simulations and in vivo experiments. Computer simulations yielded a 39-57% improvement in velocity-noise ratio (corresponding to a 27-33% reduction in measurement error), depending on which method was used for comparison. Moreover, in vivo experiments confirmed this by demonstrating a 26-53% reduction in accumulated velocity error over the R-R interval. The nine-point balanced phase-contrast-MRI-encoding strategy is likely useful for settings where high spatial and temporal resolution and/or high motion sensitivity is required, such as in high-resolution rodent myocardial tissue phase mapping. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc. Copyright © 2012 Wiley Periodicals, Inc. |
| spellingShingle | Espe, E Espe, E Aronsen, J Aronsen, J Aronsen, J Skrbic, B Skrbic, B Skulberg, V Schneider, J Sejersted, O Sejersted, O Zhang, L Zhang, L Sjaastad, I Sjaastad, I Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title | Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title_full | Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title_fullStr | Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title_full_unstemmed | Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title_short | Improved MR phase-contrast velocimetry using a novel nine-point balanced motion-encoding scheme with increased robustness to eddy current effects |
| title_sort | improved mr phase contrast velocimetry using a novel nine point balanced motion encoding scheme with increased robustness to eddy current effects |
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