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Whole-heart four-dimensional flow can be acquired with preserved quality without respiratory gating, facilitating clinical use : A head-to-head comparison

Kanski, Mikael LU ; Töger, Johannes LU ; Steding-Ehrenborg, Katarina LU ; Xanthis, Christos LU ; Bloch, Karin Markenroth LU ; Heiberg, Einar LU ; Carlsson, Marcus LU and Arheden, Håkan LU (2015) In BMC Medical Imaging 15(1).
Abstract

Background: Respiratory gating is often used in 4D-flow acquisition to reduce motion artifacts. However, gating increases scan time. The aim of this study was to investigate if respiratory gating can be excluded from 4D flow acquisitions without affecting quantitative intracardiac parameters. Methods: Eight volunteers underwent CMR at 1.5 T with a 5-channel coil (5ch). Imaging included 2D flow measurements and whole-heart 4D flow with and without respiratory gating (Resp(+), Resp(-)). Stroke volume (SV), particle-trace volumes, kinetic energy, and vortex-ring volume were obtained from 4D flow-data. These parameters were compared between 5ch Resp(+) and 5ch Resp(-). In addition, 20 patients with heart failure were scanned using a... (More)

Background: Respiratory gating is often used in 4D-flow acquisition to reduce motion artifacts. However, gating increases scan time. The aim of this study was to investigate if respiratory gating can be excluded from 4D flow acquisitions without affecting quantitative intracardiac parameters. Methods: Eight volunteers underwent CMR at 1.5 T with a 5-channel coil (5ch). Imaging included 2D flow measurements and whole-heart 4D flow with and without respiratory gating (Resp(+), Resp(-)). Stroke volume (SV), particle-trace volumes, kinetic energy, and vortex-ring volume were obtained from 4D flow-data. These parameters were compared between 5ch Resp(+) and 5ch Resp(-). In addition, 20 patients with heart failure were scanned using a 32-channel coil (32ch), and particle-trace volumes were compared to planimetric SV. Paired comparisons were performed using Wilcoxon's test and correlation analysis using Pearson r. Agreement was assessed as bias ± SD. Results: Stroke volume from 4D flow was lower compared to 2D flow both with and without respiratory gating (5ch Resp(+) 88 ± 18 vs 97 ± 24.0, p = 0.001; 5ch Resp(-) 86 ± 16 vs 97.1 ± 22.7, p < 0.01). There was a good correlation between Resp(+) and Resp(-) for particle-trace derived volumes (R2 = 0.82, 0.2 ± 9.4 ml), mean kinetic energy (R2 = 0.86, 0.07 ± 0.21 mJ), peak kinetic energy (R2 = 0.88, 0.14 ± 0.77 mJ), and vortex-ring volume (R2 = 0.70, -2.5 ± 9.4 ml). Furthermore, good correlation was found between particle-trace volume and planimetric SV in patients for 32ch Resp(-) (R2 = 0.62, -4.2 ± 17.6 ml) and in healthy volunteers for 5ch Resp(+) (R2 = 0.89, -11 ± 7 ml), and 5ch Resp(-) (R2 = 0.93, -7.5 ± 5.4 ml), Average scan duration for Resp(-) was shorter compared to Resp(+) (27 ± 9 min vs 61 ± 19 min, p < 0.05). Conclusions: Whole-heart 4D flow can be acquired with preserved quantitative results without respiratory gating, facilitating clinical use.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
4D flow, Cardiac MRI, Kinetic energy, Particle trace, Respiratory gating, Vortex ring size
in
BMC Medical Imaging
volume
15
issue
1
publisher
BioMed Central
external identifiers
  • pmid:26080805
  • wos:000356410200001
  • scopus:84935922376
ISSN
1471-2342
DOI
10.1186/s12880-015-0061-4
language
English
LU publication?
yes
id
1e8f448d-ddc9-4dac-b99d-ae091487ebbd (old id 7485472)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/26080805?dopt=Abstract
date added to LUP
2015-07-08 17:21:17
date last changed
2017-10-22 04:12:47
@article{1e8f448d-ddc9-4dac-b99d-ae091487ebbd,
  abstract     = {<p>Background: Respiratory gating is often used in 4D-flow acquisition to reduce motion artifacts. However, gating increases scan time. The aim of this study was to investigate if respiratory gating can be excluded from 4D flow acquisitions without affecting quantitative intracardiac parameters. Methods: Eight volunteers underwent CMR at 1.5 T with a 5-channel coil (5ch). Imaging included 2D flow measurements and whole-heart 4D flow with and without respiratory gating (Resp(+), Resp(-)). Stroke volume (SV), particle-trace volumes, kinetic energy, and vortex-ring volume were obtained from 4D flow-data. These parameters were compared between 5ch Resp(+) and 5ch Resp(-). In addition, 20 patients with heart failure were scanned using a 32-channel coil (32ch), and particle-trace volumes were compared to planimetric SV. Paired comparisons were performed using Wilcoxon's test and correlation analysis using Pearson r. Agreement was assessed as bias ± SD. Results: Stroke volume from 4D flow was lower compared to 2D flow both with and without respiratory gating (5ch Resp(+) 88 ± 18 vs 97 ± 24.0, p = 0.001; 5ch Resp(-) 86 ± 16 vs 97.1 ± 22.7, p &lt; 0.01). There was a good correlation between Resp(+) and Resp(-) for particle-trace derived volumes (R<sup>2</sup> = 0.82, 0.2 ± 9.4 ml), mean kinetic energy (R<sup>2</sup> = 0.86, 0.07 ± 0.21 mJ), peak kinetic energy (R<sup>2</sup> = 0.88, 0.14 ± 0.77 mJ), and vortex-ring volume (R<sup>2</sup> = 0.70, -2.5 ± 9.4 ml). Furthermore, good correlation was found between particle-trace volume and planimetric SV in patients for 32ch Resp(-) (R<sup>2</sup> = 0.62, -4.2 ± 17.6 ml) and in healthy volunteers for 5ch Resp(+) (R<sup>2</sup> = 0.89, -11 ± 7 ml), and 5ch Resp(-) (R<sup>2</sup> = 0.93, -7.5 ± 5.4 ml), Average scan duration for Resp(-) was shorter compared to Resp(+) (27 ± 9 min vs 61 ± 19 min, p &lt; 0.05). Conclusions: Whole-heart 4D flow can be acquired with preserved quantitative results without respiratory gating, facilitating clinical use.</p>},
  articleno    = {20},
  author       = {Kanski, Mikael and Töger, Johannes and Steding-Ehrenborg, Katarina and Xanthis, Christos and Bloch, Karin Markenroth and Heiberg, Einar and Carlsson, Marcus and Arheden, Håkan},
  issn         = {1471-2342},
  keyword      = {4D flow,Cardiac MRI,Kinetic energy,Particle trace,Respiratory gating,Vortex ring size},
  language     = {eng},
  month        = {06},
  number       = {1},
  publisher    = {BioMed Central},
  series       = {BMC Medical Imaging},
  title        = {Whole-heart four-dimensional flow can be acquired with preserved quality without respiratory gating, facilitating clinical use : A head-to-head comparison},
  url          = {http://dx.doi.org/10.1186/s12880-015-0061-4},
  volume       = {15},
  year         = {2015},
}