| Spatial factors for quantifying constant flow velocity in a small tube phantom: comparison of phase-contrast cine-magnetic resonance imaging and the intraluminal Doppler guidewire method. | |
| | |
MedLine Citation:
|
PMID: 19943143 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
PURPOSE: We examined the spatial factors influencing magnetic resonance (MR) flow velocity measurements in a small tube phantom and used the same measurements obtained with an intraluminal Doppler guidewire as reference. MATERIALS AND METHODS: We generated constant flow velocities from approximately 40 to 370 cm/s in a tube 4 mm in diameter. We then performed segmented k-space, phase-contrast cine-MR imaging to quantify spatial peak flow velocities of one pixel and of five adjacent pixels as well as spatial mean velocities within regions of interest in a cross section of the phantom. Pixel dimensions ranged from 1.00 x 1.00 mm to 2.50 x 2.50 mm. We compared the MR measurements with the temporally averaged Doppler spectral peak velocities. RESULTS: For one pixel (r > 0.99: MR flow velocity for pixel dimension 1.00 x 1.00 mm = 1.03x + 9.8 cm/s), the linear correlation was excellent between flow velocities by MR and Doppler guidewire methods. However, for the five adjacent pixels, MR measurements were significantly underestimated using pixels 1.25 x 1.25 mm to 2.50 x 2.50 mm and for mean velocities for all pixel dimensions. CONCLUSION: Relatively high spatial resolution allows accurate MR measurement of constant flow velocity in a small tube at spatial peak velocities for one pixel. |
| | |
Authors:
|
Haruhiko Machida; Yoshiaki Komori; Eiko Ueno; Yun Shen; Masami Hirata; Shinya Kojima; Satoru Morita; Munekuni Sato; Takeshi Okazaki |
Related Documents
:
|
1863473 - Color doppler sonography of the scrotum. 10800003 - Power doppler sonographic diagnosis of torsion in a wandering spleen. 19401053 - The utility of cadaver dissection in endoscopic sinus surgery training courses. |
Publication Detail:
|
Type: Comparative Study; Journal Article Date: 2009-11-27 |
Journal Detail:
|
Title: Japanese journal of radiology Volume: 27 ISSN: 1867-108X ISO Abbreviation: Jpn J Radiol Publication Date: 2009 Nov |
Date Detail:
|
Created Date: 2009-11-27 Completed Date: 2010-02-18 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101490689 Medline TA: Jpn J Radiol Country: Japan |
Other Details:
|
Languages: eng Pagination: 335-41 Citation Subset: IM |
Affiliation:
|
Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan. machira@dnh.twmu.ac.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Blood Flow Velocity Coronary Vessels Electrocardiography Image Processing, Computer-Assisted / methods Magnetic Resonance Imaging, Cine / methods* Models, Cardiovascular* Phantoms, Imaging* Reproducibility of Results Ultrasonography, Doppler / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Extension of mouse lifespan by overexpression of catalase.
Next Document: Evaluation of interobserver differences in postimplant dosimetry following prostate brachytherapy an...