scholarly journals Respiratory motion corrected 4D flow using golden radial phase encoding

2019 ◽  
Vol 83 (2) ◽  
pp. 635-644 ◽  
Author(s):  
Christoph Kolbitsch ◽  
Rene Bastkowski ◽  
Tobias Schäffter ◽  
Claudia Prieto Vasquez ◽  
Kilian Weiss ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
4D Flow ◽  
Phase Encoding ◽  
Radial Phase

scholarly journals Highly efficient whole-heart imaging using radial phase encoding-phase ordering with automatic window selection

2011 ◽  
Vol 66 (4) ◽  
pp. 1008-1018 ◽  
Author(s):  
Christoph Kolbitsch ◽  
Claudia Prieto ◽  
Jouke Smink ◽  
Tobias Schaeffter
Keyword(s):  
Phase Encoding ◽  
Highly Efficient ◽  
Heart Imaging ◽  
Phase Ordering ◽  
Window Selection ◽  
Whole Heart Imaging ◽  
Whole Heart ◽  
Radial Phase

scholarly journals 3D undersampled golden‐radial phase encoding for DCE‐MRA using inherently regularized iterative SENSE

2010 ◽  
Vol 64 (2) ◽  
pp. 514-526 ◽  
Author(s):  
Claudia Prieto ◽  
Sergio Uribe ◽  
Reza Razavi ◽  
David Atkinson ◽  
Tobias Schaeffter
Keyword(s):  
Phase Encoding ◽  
Radial Phase

scholarly journals Accelerating dual cardiac phase images using undersampled radial phase encoding trajectories

2016 ◽  
Vol 34 (7) ◽  
pp. 1017-1025 ◽  
Author(s):  
Karis Letelier ◽  
Jesus Urbina ◽  
Marcelo Andía ◽  
Cristián Tejos ◽  
Pablo Irarrazaval ◽  
...  
Keyword(s):  
Cardiac Phase ◽  
Phase Encoding ◽  
Phase Images ◽  
Radial Phase

scholarly journals Comparison of respiratory motion suppression techniques for 4D flow MRI

2017 ◽  
Vol 78 (5) ◽  
pp. 1877-1882 ◽  
Author(s):  
Petter Dyverfeldt ◽  
Tino Ebbers
Keyword(s):  
Respiratory Motion ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Motion Suppression

scholarly journals Whole-heart imaging using undersampled radial phase encoding (RPE) and iterative sensitivity encoding (SENSE) reconstruction

2009 ◽  
Vol 62 (5) ◽  
pp. 1331-1337 ◽  
Author(s):  
R. Boubertakh ◽  
C. Prieto ◽  
P.G. Batchelor ◽  
S. Uribe ◽  
D. Atkinson ◽  
...  
Keyword(s):  
Phase Encoding ◽  
Heart Imaging ◽  
Sensitivity Encoding ◽  
Whole Heart Imaging ◽  
Whole Heart ◽  
Sense Reconstruction ◽  
Radial Phase

scholarly journals Coronary Flow Assessment Using Accelerated 4D Flow MRI With Respiratory Motion Correction

2021 ◽  
Vol 9 ◽  
Author(s):  
Carmen P. S. Blanken ◽  
Eric M. Schrauben ◽  
Eva S. Peper ◽  
Lukas M. Gottwald ◽  
Bram F. Coolen ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Motion Correction ◽  
Respiratory Motion ◽  
Flow Quantification ◽  
4D Flow Mri ◽  
4D Flow ◽  
Blood Flow Quantification ◽  
Respiratory Motion Correction ◽  
2D Flow ◽  
Flow Mri

Magnetic resonance imaging (MRI) can potentially be used for non-invasive screening of patients with stable angina pectoris to identify probable obstructive coronary artery disease. MRI-based coronary blood flow quantification has to date only been performed in a 2D fashion, limiting its clinical applicability. In this study, we propose a framework for coronary blood flow quantification using accelerated 4D flow MRI with respiratory motion correction and compressed sensing image reconstruction. We investigate its feasibility and repeatability in healthy subjects at rest. Fourteen healthy subjects received 8 times-accelerated 4D flow MRI covering the left coronary artery (LCA) with an isotropic spatial resolution of 1.0 mm3. Respiratory motion correction was performed based on 1) lung-liver navigator signal, 2) real-time monitoring of foot-head motion of the liver and LCA by a separate acquisition, and 3) rigid image registration to correct for anterior-posterior motion. Time-averaged diastolic LCA flow was determined, as well as time-averaged diastolic maximal velocity (VMAX) and diastolic peak velocity (VPEAK). 2D flow MRI scans of the LCA were acquired for reference. Scan-rescan repeatability and agreement between 4D flow MRI and 2D flow MRI were assessed in terms of concordance correlation coefficient (CCC) and coefficient of variation (CV). The protocol resulted in good visibility of the LCA in 11 out of 14 subjects (six female, five male, aged 28 ± 4 years). The other 3 subjects were excluded from analysis. Time-averaged diastolic LCA flow measured by 4D flow MRI was 1.30 ± 0.39 ml/s and demonstrated good scan-rescan repeatability (CCC/CV = 0.79/20.4%). Time-averaged diastolic VMAX (17.2 ± 3.0 cm/s) and diastolic VPEAK (24.4 ± 6.5 cm/s) demonstrated moderate repeatability (CCC/CV = 0.52/19.0% and 0.68/23.0%, respectively). 4D flow- and 2D flow-based diastolic LCA flow agreed well (CCC/CV = 0.75/20.1%). Agreement between 4D flow MRI and 2D flow MRI was moderate for both diastolic VMAX and VPEAK (CCC/CV = 0.68/20.3% and 0.53/27.0%, respectively). In conclusion, the proposed framework of accelerated 4D flow MRI equipped with respiratory motion correction and compressed sensing image reconstruction enables repeatable diastolic LCA flow quantification that agrees well with 2D flow MRI.

4D-Flow MRI: Beyond the Images

2020 ◽  
Vol 32 (1) ◽  
pp. 35
Author(s):  
Pietro Sergio ◽  
Antonio Miceli
Keyword(s):  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri

Misregistration Artifact due to Respiratory Motion on Spiral CT of the Liver

2001 ◽  
Vol 44 (2) ◽  
pp. 201 ◽  
Author(s):  
Su Young Park ◽  
Hi Jin Park ◽  
Hong Kim ◽  
Hee Jung Lee ◽  
Sung Ku Woo ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Spiral Ct
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