Universität zu Köln

Sellerer, Thorsten, Noel, Peter B., Patino, Manuel, Parakh, Anushri, Ehn, Sebastian, Zeiter, Sascha, Holz, Jasmin A., Hammel, Johannes, Fingerle, Alexander A., Pfeiffer, Franz, Maintz, David, Rummeny, Ernst J., Muenzel, Daniela and Sahani, Dushyant V. (2018). Dual-energy CT: a phantom comparison of different platforms for abdominal imaging. Eur. Radiol., 28 (7). S. 2745 - 2756. NEW YORK: SPRINGER. ISSN 1432-1084

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Abstract

Evaluation of imaging performance across dual-energy CT (DECT) platforms, including dual-layer CT (DLCT), rapid-kVp-switching CT (KVSCT) and dual-source CT (DSCT). A semi-anthropomorphic abdomen phantom was imaged on these DECT systems. Scans were repeated three times for CTDIvol levels of 10 mGy, 20 mGy, 30 mGy and different fat-simulating extension rings. Over the available range of virtual-monoenergetic images (VMI), noise as well as quantitative accuracy of hounsfield units (HU) and iodine concentrations were evaluated. For all VMI levels, HU values could be determined with high accuracy compared to theoretical values. For KVSCT and DSCT, a noise increase was observed towards lower VMI levels. A patient-size dependent increase in the uncertainty of quantitative iodine concentrations is observed for all platforms. For a medium patient size the iodine concentration root-mean-square deviation at 20 mGy is 0.17 mg/ml (DLCT), 0.30 mg/ml (KVSCT) and 0.77mg/ml (DSCT). Noticeable performance differences are observed between investigated DECT systems. Iodine concentrations and VMI HUs are accurately determined across all DECT systems. KVSCT and DLCT deliver slightly more accurate iodine concentration values than DSCT for investigated scenarios. In DLCT, low-noise and high-image contrast at low VMI levels may help to increase diagnostic information in abdominal CT. Current dual-energy CT platforms provide accurate, reliable quantitative information. Dual-energy CT cross-platform evaluation revealed noticeable performance differences between different systems. Dual-layer CT offers constant noise levels over the complete energy range.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sellerer, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Noel, Peter B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Patino, Manuel UNSPECIFIED UNSPECIFIED UNSPECIFIED Parakh, Anushri UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehn, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Zeiter, Sascha UNSPECIFIED UNSPECIFIED UNSPECIFIED Holz, Jasmin A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hammel, Johannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Fingerle, Alexander A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pfeiffer, Franz UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Rummeny, Ernst J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Muenzel, Daniela UNSPECIFIED UNSPECIFIED UNSPECIFIED Sahani, Dushyant V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-180409
DOI:	10.1007/s00330-017-5238-5
Journal or Publication Title:	Eur. Radiol.
Volume:	28
Number:	7
Page Range:	S. 2745 - 2756
Date:	2018
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-1084
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PERFUSION COMPUTED-TOMOGRAPHY; IODINE QUANTIFICATION; PRINCIPLES; EXPERIENCE; ACCURACY; ANGIOGRAPHY; PROTOCOLS; DISCOVERY Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/18040