Combined transesophageal and surface MRI provides optimal imaging in aortic atherosclerosis.

Details

Serval ID
serval:BIB_6E0686881E80
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Combined transesophageal and surface MRI provides optimal imaging in aortic atherosclerosis.
Journal
Journal of Cardiovascular Magnetic Resonance
Author(s)
Steen H., Warren W.P., Desai M., Gautam S., Lai S., Heath S., Stuber M., Lima J.A.
ISSN
1097-6647[print], 1097-6647[linking]
Publication state
Published
Issued date
2004
Volume
6
Number
4
Pages
909-916
Language
english
Notes
Publication types: Comparative Study ; Journal Article
Publication Status: ppublish
Abstract
OBJECTIVE: Surface magnetic resonance imaging (MRI) for aortic plaque assessment is limited by the trade-off between penetration depth and signal-to-noise ratio (SNR). For imaging the deep seated aorta, a combined surface and transesophageal MRI (TEMRI) technique was developed 1) to determine the individual contribution of TEMRI and surface coils to the combined signal, 2) to measure the signal improvement of a combined surface and TEMRI over surface MRI, and 3) to assess for reproducibility of plaque dimension analysis. METHODS AND RESULTS: In 24 patients six black blood proton-density/T2-weighted fast-spin echo images were obtained using three surface and one TEMRI coil for SNR measurements. Reproducibility of plaque dimensions (combined surface and TEMRI) was measured in 10 patients. TEMRI contributed 68% of the signal in the aortic arch and descending aorta, whereas the overall signal gain using the combined technique was up to 225%. Plaque volume measurements had an intraclass correlation coefficient of as high as 0.97. CONCLUSION: Plaque volume measurements for the quantification of aortic plaque size are highly reproducible for combined surface and TEMRI. The TEMRI coil contributes considerably to the aortic MR signal. The combined surface and TEMRI approach improves aortic signal significantly as compared to surface coils alone. CONDENSED ABSTRACT: Conventional MRI aortic plaque visualization is limited by the penetration depth of MRI surface coils and may lead to suboptimal image quality with insufficient reproducibility. By combining a transesophageal MRI (TEMRI) with surface MRI coils we enhanced local and overall image SNR for improved image quality and reproducibility.
Keywords
Aged, Aorta, Thoracic/pathology, Aortic Diseases/diagnosis, Aortic Diseases/pathology, Atherosclerosis/diagnosis, Atherosclerosis/pathology, Esophagus, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging/methods, Male, Middle Aged, Observer Variation, Reproducibility of Results
Pubmed
Web of science
Create date
02/03/2010 17:04
Last modification date
20/08/2019 15:27
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