Please use this identifier to cite or link to this item: https://doi.org/10.1186/1532-429X-12-5
Title: Flow measurement by cardiovascular magnetic resonance: A multi-centre multi-vendor study of background phase offset errors that can compromise the accuracy of derived regurgitant or shunt flow measurements
Authors: Gatehouse, P
Rolf, M
Graves, M
Hofman, M
Totman, J 
Werner, B
Quest, R
Liu, Y
Von Spiczak, J
Dieringer, M
Firmin, D
Van Rossum, A
Lombardi, M
Schwitter, J
Schulz-Menger, J
Kilner, P
Keywords: gadolinium pentetate
gelatin
article
blood flowmetry
cardiovascular system examination
diagnostic accuracy
electrocardiography
heart output measurement
nuclear magnetic resonance imaging
phase contrast microscope
priority journal
aorta
artifact
blood flow velocity
breathing mechanics
clinical trial
computer assisted diagnosis
heart output
human
image quality
instrumentation
materials testing
mitral valve regurgitation
multicenter study
pathophysiology
prediction and forecasting
pulmonary artery
reproducibility
Aorta
Artifacts
Blood Flow Velocity
Cardiac Output
Gelatin
Humans
Image Interpretation, Computer-Assisted
Magnetic Resonance Imaging, Cine
Materials Testing
Mitral Valve Insufficiency
Phantoms, Imaging
Predictive Value of Tests
Pulmonary Artery
Reproducibility of Results
Respiratory Mechanics
Issue Date: 2010
Citation: Gatehouse, P, Rolf, M, Graves, M, Hofman, M, Totman, J, Werner, B, Quest, R, Liu, Y, Von Spiczak, J, Dieringer, M, Firmin, D, Van Rossum, A, Lombardi, M, Schwitter, J, Schulz-Menger, J, Kilner, P (2010). Flow measurement by cardiovascular magnetic resonance: A multi-centre multi-vendor study of background phase offset errors that can compromise the accuracy of derived regurgitant or shunt flow measurements. Journal of Cardiovascular Magnetic Resonance 12 (1) : 5. ScholarBank@NUS Repository. https://doi.org/10.1186/1532-429X-12-5
Rights: Attribution 4.0 International
Abstract: Aims. Cardiovascular magnetic resonance (CMR) allows non-invasive phase contrast measurements of flow through planes transecting large vessels. However, some clinically valuable applications are highly sensitive to errors caused by small offsets of measured velocities if these are not adequately corrected, for example by the use of static tissue or static phantom correction of the offset error. We studied the severity of uncorrected velocity offset errors across sites and CMR systems. Methods and Results. In a multi-centre, multi-vendor study, breath-hold through-plane retrospectively ECG-gated phase contrast acquisitions, as are used clinically for aortic and pulmonary flow measurement, were applied to static gelatin phantoms in twelve 1.5 T CMR systems, using a velocity encoding range of 150 cm/s. No post-processing corrections of offsets were implemented. The greatest uncorrected velocity offset, taken as an average over a 'great vessel' region (30 mm diameter) located up to 70 mm in-plane distance from the magnet isocenter, ranged from 0.4 cm/s to 4.9 cm/s. It averaged 2.7 cm/s over all the planes and systems. By theoretical calculation, a velocity offset error of 0.6 cm/s (representing just 0.4% of a 150 cm/s velocity encoding range) is barely acceptable, potentially causing about 5% miscalculation of cardiac output and up to 10% error in shunt measurement. Conclusion. In the absence of hardware or software upgrades able to reduce phase offset errors, all the systems tested appeared to require post-acquisition correction to achieve consistently reliable breath-hold measurements of flow. The effectiveness of offset correction software will still need testing with respect to clinical flow acquisitions. © 2010 Gatehouse et al; licensee BioMed Central Ltd.
Source Title: Journal of Cardiovascular Magnetic Resonance
URI: https://scholarbank.nus.edu.sg/handle/10635/183265
ISSN: 10976647
DOI: 10.1186/1532-429X-12-5
Rights: Attribution 4.0 International
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