Low-iodine 40-keV virtual monoenergetic CT angiography of the lower extremities.

Détails

ID Serval
serval:BIB_24135E2F826A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Low-iodine 40-keV virtual monoenergetic CT angiography of the lower extremities.
Périodique
Frontiers in cardiovascular medicine
Auteur⸱e⸱s
Fahrni G., Mingas T., Deliessche A., Hraichi S., Rotzinger D.C., Si-Mohamed S.A., Boccalini S., Douek P.
ISSN
2297-055X (Print)
ISSN-L
2297-055X
Statut éditorial
Publié
Date de publication
2023
Peer-reviewed
Oui
Volume
10
Pages
1276738
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
To evaluate a reduced iodine volume protocol for lower extremity CT angiography (CTA) using dual-energy CT (DECT).
This retrospective study included consecutive patients who underwent lower extremity CTA from June to December 2022. A 10 ml 1:1 mixed test bolus was performed, followed by a 40 ml full bolus at a 2.5/s injection rate, using 400 mg/ml iodine contrast media. Conventional and 40 keV virtual monoenergetic images (VMI) were reconstructed. For both reconstructions, five main artery segments were assessed with a 3-point image quality score as well as quantitative attenuation, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) measurements with diagnostic quality thresholds (respectively >150 HU and >3).
Forty patients were included in the study (mean age 68 ± 12 yo). 200 artery segments were assessed. Median qualitative image scores were 3 [IQR, 3, 3] for both reconstructions. 40 keV VMI upgraded qualitative scores for 51 (26%) of patients, including 9 (5%) from nondiagnostic to diagnostic quality. 40 keV VMI obtained attenuation and CNR diagnostic quality for respectively 100% and 100% of segments, compared with 96% and 98% for conventional images (p < 0.001). Distal artery segments showed the most differences between 40 keV VMI and conventional images.
A low-iodine lower extremity CTA protocol is feasible, with 40 keV virtual monoenergetic spectral reconstruction enabling maintained diagnostic image quality at the distal artery segments.
Mots-clé
40-keV, CT angiography, DECT, arteries, lower extremities, monoenergetic, peripheral artery disease, reduced iodine volume
Pubmed
Web of science
Open Access
Oui
Création de la notice
13/11/2023 15:21
Dernière modification de la notice
19/12/2023 8:15
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