| Assessment of pulmonary artery stiffness using velocity-encoding magnetic resonance imaging: evaluation of techniques. | |
| | |
MedLine Citation:
|
PMID: 21641745 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
The loss of pulmonary artery (PA) compliance has significant pathophysiological effect on the right ventricle. Noninvasive and reliable assessment of PA wall stiffness would be an essential determiner of right heart load and a clinically useful factor to assess cardiovascular risk. Two MRI techniques have been proposed for assessing PA stiffness by measuring pulse wave velocity (PWV): transit time (TT) and flow area (QA). However, no data are available that compares the two techniques and evaluates their performance, especially over a wide range of PWV values or at 3.0-T, which is the purpose of the present study. Thirty-three patients with different heart conditions were imaged using optimized high-temporal resolution and high-spatial resolution velocity-encoding MRI sequences. Statistical analysis was conducted to study intermethod, interobserver and intraobserver variabilities. The PWV measurements using TT and QA techniques showed good agreement (P>0.1). The Bland-Altman analysis showed negligible differences between the two methods (mean±S.D.=0.11±0.35 m/s, correlation coefficient r=0.94). The repeated measurements showed low interobserver and intraobserver variabilities, although the S.D. of the differences was larger in the QA technique. The mean±S.D. of the TT/QA measurement differences were -0.05±0.2/0.0±0.36 m/s and 0.02±0.26/0.02±0.39 m/s for the interobserver and intraobserver differences, respectively. In conclusion, each technique has its own advantages and disadvantages. The two techniques result in similar measurements, although the QA method is more subjective due to its dependency on operator intervention. |
| | |
Authors:
|
El-Sayed H Ibrahim; Jean M Shaffer; Richard D White |
Related Documents
:
|
15162235 - Imaging of neuroendocrine tumors: accuracy of helical ct versus srs. 7367635 - Differentiation of acoustic shadowing due to calculi and gas collections. 21769445 - Inter- and intraobserver reliability assessment of computed tomographic 3d measurement ... 10759655 - One year's clinical experience with unenhanced spiral computed tomography for the asses... 15162235 - Imaging of neuroendocrine tumors: accuracy of helical ct versus srs. 20204425 - Determination of axial vertebral rotation in mr images: comparison of four manual and a... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-6-3 |
Journal Detail:
|
Title: Magnetic resonance imaging Volume: - ISSN: 1873-5894 ISO Abbreviation: - Publication Date: 2011 Jun |
Date Detail:
|
Created Date: 2011-6-6 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8214883 Medline TA: Magn Reson Imaging Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 Elsevier Inc. All rights reserved. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Simultaneous acquisition of phosphocreatine and inorganic phosphate images for Pi:PCr ratio mapping ...
Next Document: The 12-lead electrocardiogram in patients with subarachnoid hemorrhage: early risk prognostication.