Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Schneider, D; Apfaltrer, P; Sudarski, S; Nance, JW; Haubenreisser, H; Fink, C; Schoenberg, SO; Henzler, T.
Optimization of kiloelectron volt settings in cerebral and cervical dual-energy CT angiography determined with virtual monoenergetic imaging.
Acad Radiol. 2014; 21(4): 431-436.
Doi: 10.1016/j.acra.2013.12.006
Web of Science
PubMed
FullText
FullText_MUG
- Co-Autor*innen der Med Uni Graz
- Apfaltrer Paul
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- Abstract:
- Dual-energy computed tomography (DECT) offers various fields of application, especially in angiography using virtual monoenergetic imaging. The aim of this study was to evaluate objective image quality indices of calculated low-kiloelectron volt monoenergetic DECT angiographic cervical and cerebral data sets compared to virtual 120-kV polyenergetic images. Forty-one patients (21 men, mean age 58 ± 14) who underwent DECT angiography of the cervical (n = 7) or cerebral vessels (n = 34) were retrospectively included in this study. Data acquired with the 80 and 140 kVp tube using dual-source CT technology were subsequently used to calculate low-kiloelectron volt monoenergetic image data sets ranging from 120 to 40 keV (at 10-keV intervals per patient). Vessel and soft tissue attenuation and image noise were measured in various regions of interest, and contrast-to-noise ratio (CNR) was subsequently calculated. Differences in image attenuation and CNR were compared between the different monoenergetic data sets and virtual 120-kV polyenergetic images. For cervical angiography, 60-keV monoenergetic data sets resulted in the greatest improvements in vessel attenuation and CNR compared to virtual 120-kV polyenergetic data sets (+40%, +16%; all P < .01). Also for cerebral vessel assessment, 60-keV monoenergetic data sets provided the greatest improvement in vessel attenuation and CNR (+40%, +9%; all P < .01) compared to virtual 120-kV polyenergetic data sets. 60-keV monoenergetic image data significantly improve vessel attenuation and CNR of cervical and cerebral DECT angiographic studies. Future studies have to evaluate whether the technique can lead to an increased diagnostic accuracy or should be used for dose reduction of iodinated contrast material. Copyright © 2014 AUR. Published by Elsevier Inc. All rights reserved.
- Find related publications in this database (using NLM MeSH Indexing)
- Adult -
- Aged -
- Cerebral Angiography - methods
- Female -
- Humans -
- Male -
- Middle Aged -
- Neck - blood supply
- Neck - diagnostic imaging
- Radiation Dosage -
- Radiation Protection - methods
- Radiographic Image Enhancement - methods
- Radiography, Dual-Energy Scanned Projection - methods
- Reproducibility of Results -
- Sensitivity and Specificity -
- Tomography, X-Ray Computed - methods
- Young Adult -
- Find related publications in this database (Keywords)
- Dual-source CT
- dual-energy CT
- virtual monoenergetic imaging
- image quality
- CT-angiography