Hickethier, Tilman, Iuga, Andra-Iza, Lennartz, Simon, Hauger, Myriam, Byrtus, Jonathan, Luetkens, Julian A., Haneder, Stefan, Maintz, David and Doerner, Jonas (2018). Virtual Monoenergetic Images From a Novel Dual-Layer Spectral Detector Computed Tomography Scanner in Portal Venous Phase: Adjusted Window Settings Depending on Assessment Focus Are Essential for Image Interpretation. J. Comput. Assist. Tomogr., 42 (3). S. 350 - 357. PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1532-3145

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Abstract

Objective We aimed to determine optimal window settings for conventional polyenergetic (PolyE) and virtual monoenergetic images (MonoE) derived from abdominal portal venous phase computed tomography (CT) examinations on a novel dual-layer spectral-detector CT (SDCT). Methods From 50 patients, SDCT data sets MonoE at 40 kiloelectron volt as well as PolyE were reconstructed and best individual window width and level values manually were assessed separately for evaluation of abdominal arteries as well as for liver lesions. Via regression analysis, optimized individual values were mathematically calculated. Subjective image quality parameters, vessel, and liver lesion diameters were measured to determine influences of different W/L settings. Results Attenuation and contrast-to-noise values were significantly higher in MonoE compared with PolyE. Compared with standard settings, almost all adjusted W/L settings varied significantly and yielded higher subjective scoring. No differences were found between manually adjusted and mathematically calculated W/L settings. Conclusions PolyE and MonoE from abdominal portal venous phase SDCT examinations require appropriate W/L settings depending on reconstruction technique and assessment focus.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hickethier, TilmanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Iuga, Andra-IzaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lennartz, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hauger, MyriamUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Byrtus, JonathanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luetkens, Julian A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haneder, StefanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Maintz, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doerner, JonasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-187669
DOI: 10.1097/RCT.0000000000000711
Journal or Publication Title: J. Comput. Assist. Tomogr.
Volume: 42
Number: 3
Page Range: S. 350 - 357
Date: 2018
Publisher: LIPPINCOTT WILLIAMS & WILKINS
Place of Publication: PHILADELPHIA
ISSN: 1532-3145
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ENERGY CT; SINGLE-ENERGY; RECONSTRUCTION TECHNIQUE; QUALITY; HEAD; OPTIMIZATION; CONTRAST; LIVER; ANGIOGRAPHY; CARCINOMAMultiple languages
Radiology, Nuclear Medicine & Medical ImagingMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/18766

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