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The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images
BACKGROUND: It is needed to minimize the effect of flow direction on the desired area, such as arterial input function (AIF) in magnetic resonance imaging (MRI). OBJECTIVE: The current study aimed to investigate the effect of flow direction on different velocities (0–80.39 cm/s) for the strength of...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Shiraz University of Medical Sciences
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9923244/ https://www.ncbi.nlm.nih.gov/pubmed/36818011 http://dx.doi.org/10.31661/jbpe.v0i0.2203-1468 |
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author | Nazarpoor, Mahmood |
author_facet | Nazarpoor, Mahmood |
author_sort | Nazarpoor, Mahmood |
collection | PubMed |
description | BACKGROUND: It is needed to minimize the effect of flow direction on the desired area, such as arterial input function (AIF) in magnetic resonance imaging (MRI). OBJECTIVE: The current study aimed to investigate the effect of flow direction on different velocities (0–80.39 cm/s) for the strength of the signal intensity (SI) at the linear phase-encoding (LPE) and the center out phase-encoding (COPE) schemes and to recommend the best flow direction in a selected slice and scheme for absolute perfusion measurement by inversion recovery T1-weighted turbo fast low-angle shot (TurboFLASH) MR images. MATERIAL AND METHODS: In this experimental study, the flow rates were measured using a flow phantom, and the signal intensity (SI) was measured at the two opposite flow directions in the Z-axis perpendicular to the coronal image at a concentration of 0.8 mmol/L of gadolinium-diethylenetriaminepantaacetic acid (Gd-DTPA) by using the LPE and COPE schemes. RESULTS: The increase in velocity along with the growth in SI and inflow affected the use of LPE and COPE acquisitions in both directions. The velocity of the arterial input function is needed to calculate the inflow correction factor by using two schemes in two opposite flow directions to investigate perfusion. CONCLUSION: The COPE scheme was better than the LPE scheme in measuring perfusion since the velocity and direction of blood flow affect SI less. |
format | Online Article Text |
id | pubmed-9923244 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Shiraz University of Medical Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-99232442023-02-16 The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images Nazarpoor, Mahmood J Biomed Phys Eng Original Article BACKGROUND: It is needed to minimize the effect of flow direction on the desired area, such as arterial input function (AIF) in magnetic resonance imaging (MRI). OBJECTIVE: The current study aimed to investigate the effect of flow direction on different velocities (0–80.39 cm/s) for the strength of the signal intensity (SI) at the linear phase-encoding (LPE) and the center out phase-encoding (COPE) schemes and to recommend the best flow direction in a selected slice and scheme for absolute perfusion measurement by inversion recovery T1-weighted turbo fast low-angle shot (TurboFLASH) MR images. MATERIAL AND METHODS: In this experimental study, the flow rates were measured using a flow phantom, and the signal intensity (SI) was measured at the two opposite flow directions in the Z-axis perpendicular to the coronal image at a concentration of 0.8 mmol/L of gadolinium-diethylenetriaminepantaacetic acid (Gd-DTPA) by using the LPE and COPE schemes. RESULTS: The increase in velocity along with the growth in SI and inflow affected the use of LPE and COPE acquisitions in both directions. The velocity of the arterial input function is needed to calculate the inflow correction factor by using two schemes in two opposite flow directions to investigate perfusion. CONCLUSION: The COPE scheme was better than the LPE scheme in measuring perfusion since the velocity and direction of blood flow affect SI less. Shiraz University of Medical Sciences 2023-02-01 /pmc/articles/PMC9923244/ /pubmed/36818011 http://dx.doi.org/10.31661/jbpe.v0i0.2203-1468 Text en Copyright: © Journal of Biomedical Physics and Engineering https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 Unported License, ( http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Nazarpoor, Mahmood The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title | The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title_full | The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title_fullStr | The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title_full_unstemmed | The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title_short | The Direction of Flow and Phase-encoding Schemes Effects on Signal Intensity in T1-weighted Inversion Recovery TurboFLASH Images |
title_sort | direction of flow and phase-encoding schemes effects on signal intensity in t1-weighted inversion recovery turboflash images |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9923244/ https://www.ncbi.nlm.nih.gov/pubmed/36818011 http://dx.doi.org/10.31661/jbpe.v0i0.2203-1468 |
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