Ultrashort echo time imaging of the lungs under high-frequency noninvasive ventilation: A new approach to lung imaging.

Details

Serval ID
serval:BIB_65119F8236F7
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Ultrashort echo time imaging of the lungs under high-frequency noninvasive ventilation: A new approach to lung imaging.
Journal
Journal of magnetic resonance imaging
Author(s)
Delacoste J., Dournes G., Dunet V., Ogna A., Noirez L., Simons J., Long O., Berchier G., Stuber M., Lovis A., Beigelman-Aubry C.
ISSN
1522-2586 (Electronic)
ISSN-L
1053-1807
Publication state
Published
Issued date
12/2019
Peer-reviewed
Oui
Volume
50
Number
6
Pages
1789-1797
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Although ultrashort echo time (UTE) sequences allow excellent assessment of lung parenchyma, image quality remains lower than that of computed tomography (CT).
To investigate a high-frequency noninvasive ventilation (HF-NIV) technique allowing a stabilized inspiration and to compare image quality with current dedicated MR sequences.
Prospective.
Ten healthy volunteers.
3D radial UTE sequence at 1.5T.
UTE-HF-NIV sequence was compared with UTE-free-breathing (UTE-FB), reconstructed at end expiration (UTE-Exp) and average (UTE-Avg), and breath-hold VIBE sequences. The distance from lung apex to the dome of the right hemidiaphragm was measured. Visual assessment of the visibility and sharpness of normal anatomical structures was carried out. Dedicated software also quantitatively evaluated vessel-lung and right lung-liver interface sharpness. Apparent signal ratio (Sr) and contrast ratios (Cr) were quantitatively evaluated.
Wilcoxon signed rank test for visual scores, paired t-test for continuous variables, significance at P < 0.05.
The distance between apex and the right hemidiaphragmatic dome was significantly larger (P < 0.001) with UTE-HF-NIV compared with UTE-FB and VIBE acquisitions. Vessel and airway visibility had identical median visual scores with all UTE methods. Median visual scores for sharpness of vessels and airways were significantly higher (P < 0.001) with HF-NIV (vessels = 3; airways = 2) than in UTE-FB (vessels = 2; airways = 1) and VIBE (vessels = 1; airways = 1). Software-based vessel sharpness evaluation resulted in larger values in 8/10 volunteers with UTE-HF-NIV (67.3 ± 9.8) compared with UTE-Avg (62.3 ± 12.6) but the average difference was not significant (P = 0.28). The sharpness of the lung-liver interface was significantly higher (P < 0.001) with HF-NIV (17.3 ± 5.3) compared with UTE-Avg (14.1 ± 3.9). Significantly higher values (P < 0.01) of Sr and Cr were observed with UTE-HF-NIV compared with UTE-FB and VIBE.
HF-NIV allowing acquisition at full inspiration significantly improves image quality for lung imaging. This could offer the option to alternate some follow-up CT studies by using this technique.
2 Technical Efficacy: Stage 1 J. Magn. Reson. Imaging 2019;50:1789-1797.
Keywords
UTE, lung, respiratory stabilization, ventilation
Pubmed
Web of science
Open Access
Yes
Create date
14/06/2019 17:05
Last modification date
05/01/2020 7:18
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