Haneder, Stefan, Siedek, Florian, Doerner, Jonas, Pahn, Gregor, Hokamp, Nils Grosse, Maintz, David and Wybranski, Christian (2018). Thoracic-abdominal imaging with a novel dual-layer spectral detector CT: intra-individual comparison of image quality and radiation dose with 128-row single-energy acquisition. Acta Radiol., 59 (12). S. 1458 - 1466. LONDON: SAGE PUBLICATIONS LTD. ISSN 1600-0455
Full text not available from this repository.Abstract
Background: A novel, multi-energy, dual-layer spectral detector computed tomography (SDCT) is commercially available now with the vendor's claim that it yields the same or better quality of polychromatic, conventional CT images like modern single-energy CT scanners without any radiation dose penalty. Purpose: To intra-individually compare the quality of conventional polychromatic CT images acquired with a dual-layer spectral detector (SDCT) and the latest generation 128-row single-energy-detector (CT128) from the same manufacturer. Material and Methods: Fifty patients underwent portal-venous phase, thoracic-abdominal CT scans with the SDCT and prior CT128 imaging. The SDCT scanning protocol was adapted to yield a similar estimated dose length product (DLP) as the CT128. Patient dose optimization by automatic tube current modulation and CT image reconstruction with a state-of-the-art iterative algorithm were identical on both scanners. CT image contrast-to-noise ratio (CNR) was compared between the SDCT and CT128 in different anatomic structures. Image quality and noise were assessed independently by two readers with 5-point-Likert-scales. Volume CT dose index (CTDl(vol) ), and DLP were recorded and normalized to 68 cm acquisition length (DLP68). Results: The SDCT yielded higher mean CNR values of 30.0% +/- 2.0% (26.4-32.5%) in all anatomic structures (P < 0.001) and excellent scores for qualitative parameters surpassing the CT128 (all P < 0.0001) with substantial inter-rater agreement (kappa >= 0.801). Despite adapted scan protocols the SDCT yielded lower values for CTDl(vol) (-10.1 +/- 12.8%), DLP (-13.1 +/- 13.9%), and DLP68 (-15.3 +/- 16.9%) than the CT128 (all P < 0.0001). Conclusion: The SDCT scanner yielded better CT image quality compared to the CT128 and lower radiation dose parameters.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||
| Creators: |
|
||||||||||||||||||||||||||||||||
| URN: | urn:nbn:de:hbz:38-163151 | ||||||||||||||||||||||||||||||||
| DOI: | 10.1177/0284185118762611 | ||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Acta Radiol. | ||||||||||||||||||||||||||||||||
| Volume: | 59 | ||||||||||||||||||||||||||||||||
| Number: | 12 | ||||||||||||||||||||||||||||||||
| Page Range: | S. 1458 - 1466 | ||||||||||||||||||||||||||||||||
| Date: | 2018 | ||||||||||||||||||||||||||||||||
| Publisher: | SAGE PUBLICATIONS LTD | ||||||||||||||||||||||||||||||||
| Place of Publication: | LONDON | ||||||||||||||||||||||||||||||||
| ISSN: | 1600-0455 | ||||||||||||||||||||||||||||||||
| Language: | English | ||||||||||||||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||||||||||||||
| Uncontrolled Keywords: |
|
||||||||||||||||||||||||||||||||
| Refereed: | Yes | ||||||||||||||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/16315 |
Downloads
Downloads per month over past year
Altmetric
Export
Actions (login required)
 |
View Item |