Universität zu Köln

Iuga, Andra-Iza, Doerner, Jonas, Siedek, Florian, Haneder, Stefan, Byrtus, Jonathan, Luetkens, Julian A., Maintz, David and Hickethier, Tilman (2019). Computed tomography pulmonary angiograms using a novel dual-layer spectral detector Adjusted window settings are essential for diagnostic image quality. Medicine (Baltimore), 98 (33). PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1536-5964

Full text not available from this repository.

Abstract

Objective: The aim of this study was to determine optimal window settings for conventional polyenergetic and virtual monoenergetic images derived from computed tomography pulmonary angiogram (CTPA) examinations of a novel dual-layer spectral detector computed tomography system (DLCT). Methods: Monoenergetic (40 keV) and polyenergetic images of 50 CTPA examinations were calculated and the best individual window width and level (W/L) values were manually assessed. Optimized values were obtained afterwards based on regression analysis. Diameters of standardized pulmonary artery segments and subjective image quality parameters were evaluated and compared. Results: Attenuation and contrast-to-noise values were higher in monoenergetic than in polyenergetic images (P <=.001). Averaged best individual W/L for polyenergetic and monoenergetic were 1020/170 and 2070/480 HU, respectively. All adjusted W/L-settings varied significantly compared to standard settings (700/100 HU) and obtained higher subjective image quality scores. A systematic overestimation of artery diameters for standard window settings in monoenergetic images was observed. Conclusions: Appropriate W/L-settings are required to assess polyenergetic and monoenergetic CTPA images of a novel DLCT. W/L-settings of 1020/170 HU and 2070/480 HU were found to be the best averaged values for polyenergetic and monoenergetic CTPA images, respectively.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Iuga, Andra-Iza UNSPECIFIED UNSPECIFIED UNSPECIFIED Doerner, Jonas UNSPECIFIED UNSPECIFIED UNSPECIFIED Siedek, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Haneder, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Byrtus, Jonathan UNSPECIFIED UNSPECIFIED UNSPECIFIED Luetkens, Julian A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Hickethier, Tilman UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-145095
DOI:	10.1097/MD.0000000000016606
Journal or Publication Title:	Medicine (Baltimore)
Volume:	98
Number:	33
Date:	2019
Publisher:	LIPPINCOTT WILLIAMS & WILKINS
Place of Publication:	PHILADELPHIA
ISSN:	1536-5964
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language VIRTUAL MONOENERGETIC IMAGES; ENERGY CT; SINGLE-ENERGY; RECONSTRUCTION TECHNIQUE; OPTIMIZATION; HEAD; CONTRAST; EMBOLISM; LIVER; CARCINOMA Multiple languages Medicine, General & Internal Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14509