Inter-scan and inter-scanner variation of quantitative dual-energy CT: evaluation with three different scanner types.
Contrast media
Iodine
Reproducibility of results
Tomography, X-ray computed
Journal
European radiology
ISSN: 1432-1084
Titre abrégé: Eur Radiol
Pays: Germany
ID NLM: 9114774
Informations de publication
Date de publication:
Jul 2021
Jul 2021
Historique:
received:
25
09
2020
accepted:
04
12
2020
revised:
23
11
2020
pubmed:
15
1
2021
medline:
24
6
2021
entrez:
14
1
2021
Statut:
ppublish
Résumé
To investigate inter-scan and inter-scanner variation of iodine concentration (IC) and attenuation in virtual monoenergetic images at 65 keV (HU We retrospectively included 131 patients who underwent two abdominal DECT examinations on the same scanner (dsDECT: n = 46, rsDECT: n = 45, dlDECT: n = 40). IC and HU The three scanner-specific cohorts showed similar weight, body diameter, age, sex, and contrast media injection parameters as well as inter-scan differences hereof (p range: 0.23-0.99). Absolute inter-scan differences of HU Iodine measurements across different DECT scanners show inter-scan variation which is higher compared to variation of attenuation values. Inter-scanner differences in longitudinal variation and overall iodine concentration depend on the scanner pairs and organs assessed and should be acknowledged in clinical and scientific DECT applications. • All scanner types showed comparable inter-scan variation of attenuation, while for iodine, the rapid kV switching DECT showed lower variability in the liver and spleen. • Iodine concentration showed higher inter-scan variation than attenuation measurements; normalization to vessels did not significantly improve inter-scan reproducibility of iodine concentration in parenchymal organs. • Differences between the three scanner types regarding overall iodine concentration and attenuation obtained from both timepoints were within the range of average intra-patient, inter-scan differences for most assessed organs and vessels.
Identifiants
pubmed: 33443600
doi: 10.1007/s00330-020-07611-0
pii: 10.1007/s00330-020-07611-0
doi:
Substances chimiques
Contrast Media
0
Iodine
9679TC07X4
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4438-4451Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : LE 4401/1-1 (Project number 426969820).
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