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Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR
BACKGROUND: The purpose of this article is to describe a steady-state free precession (SSFP) sequence for fat suppressed cine cardiovascular magnetic resonance (CMR). A rapid phase-modulated binomial water excitation (WE) pulse is utilized to minimize repetition time and acquisition time. METHODS: T...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2008
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2429911/ https://www.ncbi.nlm.nih.gov/pubmed/18477396 http://dx.doi.org/10.1186/1532-429X-10-22 |
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author | Lin, Hung-Yu Raman, Subha V Chung, Yiu-Cho Simonetti, Orlando P |
author_facet | Lin, Hung-Yu Raman, Subha V Chung, Yiu-Cho Simonetti, Orlando P |
author_sort | Lin, Hung-Yu |
collection | PubMed |
description | BACKGROUND: The purpose of this article is to describe a steady-state free precession (SSFP) sequence for fat suppressed cine cardiovascular magnetic resonance (CMR). A rapid phase-modulated binomial water excitation (WE) pulse is utilized to minimize repetition time and acquisition time. METHODS: Three different water-excitation pulses were combined with cine-SSFP for evaluation. The frequency response of each sequence was simulated and examined in phantom imaging studies. The ratio of fat to water signal amplitude was measured in phantoms to evaluate the fat suppression capabilities of each method. Six volunteers underwent CMR of the heart at 1.5T to compare retrospectively-gated cine-SSFP with and without water excitation. The ratio of fat to myocardium signal amplitude was measured for conventional cine-SSFP and phase-modulated WE-SSFP. The proposed WE-SSFP method was tested in one patient referred for CMR to characterize a cardiac mass. RESULTS AND DISCUSSION: The measured frequency response in a phantom corresponded to the numerical Bloch equation simulation demonstrating the widened stop-band around the fat resonant frequency for all water-excitation pulses tested. In vivo measurements demonstrated that a rapid, phase-modulated water excitation pulse significantly reduced the signal amplitude ratio of fat to myocardium from 6.92 ± 2.9 to 0.8 ± 0.13 (mean ± SD) without inducing any perceptible artifacts in SSFP cine CMR. CONCLUSION: Fat suppression can be achieved in SSFP cine CMR while maintaining steady-state equilibrium using rapid, phase modulated, binomial water-excitation pulses. |
format | Text |
id | pubmed-2429911 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-24299112008-06-14 Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR Lin, Hung-Yu Raman, Subha V Chung, Yiu-Cho Simonetti, Orlando P J Cardiovasc Magn Reson Research BACKGROUND: The purpose of this article is to describe a steady-state free precession (SSFP) sequence for fat suppressed cine cardiovascular magnetic resonance (CMR). A rapid phase-modulated binomial water excitation (WE) pulse is utilized to minimize repetition time and acquisition time. METHODS: Three different water-excitation pulses were combined with cine-SSFP for evaluation. The frequency response of each sequence was simulated and examined in phantom imaging studies. The ratio of fat to water signal amplitude was measured in phantoms to evaluate the fat suppression capabilities of each method. Six volunteers underwent CMR of the heart at 1.5T to compare retrospectively-gated cine-SSFP with and without water excitation. The ratio of fat to myocardium signal amplitude was measured for conventional cine-SSFP and phase-modulated WE-SSFP. The proposed WE-SSFP method was tested in one patient referred for CMR to characterize a cardiac mass. RESULTS AND DISCUSSION: The measured frequency response in a phantom corresponded to the numerical Bloch equation simulation demonstrating the widened stop-band around the fat resonant frequency for all water-excitation pulses tested. In vivo measurements demonstrated that a rapid, phase-modulated water excitation pulse significantly reduced the signal amplitude ratio of fat to myocardium from 6.92 ± 2.9 to 0.8 ± 0.13 (mean ± SD) without inducing any perceptible artifacts in SSFP cine CMR. CONCLUSION: Fat suppression can be achieved in SSFP cine CMR while maintaining steady-state equilibrium using rapid, phase modulated, binomial water-excitation pulses. BioMed Central 2008-05-13 /pmc/articles/PMC2429911/ /pubmed/18477396 http://dx.doi.org/10.1186/1532-429X-10-22 Text en Copyright © 2008 Lin et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Lin, Hung-Yu Raman, Subha V Chung, Yiu-Cho Simonetti, Orlando P Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title | Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title_full | Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title_fullStr | Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title_full_unstemmed | Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title_short | Rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular MR |
title_sort | rapid phase-modulated water excitation steady-state free precession for fat suppressed cine cardiovascular mr |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2429911/ https://www.ncbi.nlm.nih.gov/pubmed/18477396 http://dx.doi.org/10.1186/1532-429X-10-22 |
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