Four-dimensional flow MRI for evaluation of post-stenotic turbulent flow in a phantom: comparison with flowmeter and computational fluid dynamics.
Objectives: To validate 4D flow MRI in a flow phantom using a flowmeter and computational fluid dynamics (CFD) as reference.Methods: Validation of 4D flow MRI was performed using flow phantoms with 75 % and 90 % stenosis. The effect of spatial resolution on flow rate, peak velocity and flow patterns...
| Publicado en: | European Radiology Vol. 26; no. 10; pp. 3588 - 3598 |
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| Autores principales: | , , , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Oct2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=118060282&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 118060282 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Oct2016 vid: 26 iid: 10 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 118060282 118060282 NLM26747263 118060282 10.1007/s00330-015-4181-6 NLM26747263 118060282 ppf: 3588 ppct: 10 formats: fmt: @attributes: type: P tig: atl: Four-dimensional flow MRI for evaluation of post-stenotic turbulent flow in a phantom: comparison with flowmeter and computational fluid dynamics. aug: au: Kweon, Jihoon Yang, Dong Kim, Guk Kim, Namkug Paek, MunYoung Stalder, Aurelien Greiser, Andreas Kim, Young-Hak Yang, Dong Hyun Kim, Guk Bae Stalder, Aurelien F affil: Department of Cardiology and Heart Institute, Asan Medical Center , University of Ulsan College of Medicine , Seoul South Korea sug: subj: Magnetic Resonance Angiography Methods Physiochemical Phenomena Models, Biological Arterial Occlusive Diseases Laboratory Equipment and Supplies Imaging, Three-Dimensional Methods Blood Flow Velocity Physiology Arterial Occlusive Diseases Physiopathology Computer Simulation Phantoms, Imaging Human Constriction, Pathologic Validation Studies Comparative Studies Evaluation Research Multicenter Studies ab: Objectives: To validate 4D flow MRI in a flow phantom using a flowmeter and computational fluid dynamics (CFD) as reference.Methods: Validation of 4D flow MRI was performed using flow phantoms with 75 % and 90 % stenosis. The effect of spatial resolution on flow rate, peak velocity and flow patterns was investigated in coronal and axial scans. The accuracy of flow rate with 4D flow MRI was evaluated using a flowmeter as reference, and the peak velocity and flow patterns obtained were compared with CFD analysis results.Results: 4D flow MRI accurately measured the flow rate in proximal and distal regions of the stenosis (percent error ≤3.6 % in axial scanning with 1.6-mm resolution). The peak velocity of 4D flow MRI was underestimated by more than 22.8 %, especially from the second half of the stenosis. With 1-mm isotropic resolution, the maximum thickness of the recirculating flow region was estimated within a 1-mm difference, but the turbulent velocity fluctuations mostly disappeared in the post-stenotic region.Conclusion: 4D flow MRI accurately measures the flow rates in the proximal and distal regions of a stenosis in axial scan but has limitations in its estimation of peak velocity and turbulent characteristics.Key Points: • 4D flow MRI accurately measures the flow rate in axial scan. • The peak velocity was underestimated by 4D flow MRI. •4D flow MRI demonstrates the principal pattern of post-stenotic flow. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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