Photon-Counting Detector CT: Potential for 75% Reduction in Contrast Medium Amount: A Phantom Study.
computed tomography
contrast medium amount
energy integrating detector CT
photon-counting detector CT
reduction
Journal
Acta medica Okayama
ISSN: 0386-300X
Titre abrégé: Acta Med Okayama
Pays: Japan
ID NLM: 0417611
Informations de publication
Date de publication:
Apr 2024
Apr 2024
Historique:
medline:
1
5
2024
pubmed:
1
5
2024
entrez:
30
4
2024
Statut:
ppublish
Résumé
This study aimed to evaluate the potential reduction in contrast medium utilization using photon-counting detector computed tomography (PCD-CT). One PCD-CT scan (CT1) and three conventional (non-PCD-CT) CT scans (CT2-CT4) were performed using a multi-energy CT phantom that contained eight rods with different iodine concentrations (0.2, 0.5, 1, 2, 5, 10, 15, and 20 mg/ml). The CT values of the seven groups (CT1 for 40, 50, 60, and 70 keV; and CT2-4) were measured. Noise and contrast-to-noise ratio (CNR) were assessed for the eight rods at various iodine concentrations. CT2 and CT1 (40 keV) respectively required 20 mg/ml and 5 mg/ml of iodine, indicating that a comparable contrast effect could be obtained with approximately one-fourth of the contrast medium amount. The standard deviation values increased at lower energy levels irrespective of the iodine concentration. The CNR exhibited a decreasing trend with lower iodine concentrations, while it remained relatively stable across all iodine levels (40-70 keV). This study demonstrated that virtual monochromatic 40 keV images offer a similar contrast effect with a reduced contrast medium amount when compared to conventional CT systems at 120 kV.
Substances chimiques
Contrast Media
0
Iodine
9679TC07X4
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
135-142Déclaration de conflit d'intérêts
No potential conflict of interest relevant to this article was reported.
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