Universität zu Köln

Zopfs, David, Lennartz, Simon, Abdullayev, Nuran ORCID: 0000-0003-4522-537X, Lichtenstein, Thorsten, Laukamp, Kai Roman, Reimer, Robert Peter, Kabbasch, Christoph, Borggrefe, Jan ORCID: 0000-0003-2908-7560, Schlamann, Marc, Neuhaus, Victor and Hokamp, Nils Grosse (2021). Generally applicable window settings of low-keV virtual monoenergetic reconstructions in dual-layer CT-angiography of the head and neck. Quant. Imaging Med. Surg., 11 (8). S. 3408 - 3418. SHATIN: AME PUBL CO. ISSN 2223-4306

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Abstract

Background: Increased vessel contrast in low-keV virtual monoenergetic images (VMI) in spectral detector CT angiography of the head and neck requires adaption of window settings. Aim of this study was to define generally applicable window settings of low-keV VMI. Methods: Two radiologists determined ideal subjective window settings for VMI40-70 keV in 54 patients. To obtain generally applicable window settings, center and width values were modeled against the attenuation of the internal carotid artery (HUICA). This modeling was performed with and without respect to keV. Subsequently, image quality of VMI40-70 keV was assessed using the model-based determined window settings. Results: With decreasing keV values, HUICA increased significantly in comparison to conventional images (CI) (P<0.05 for 40-60 keV). No significant differences between modelled and individually recorded window settings were found confirming validity of the obtained models (P values: 0.2-1.0). However, modelling with respect to keV was marginally less precise. Conclusions: Window settings of low-keV VMI can be semi-automatically determined in dependency of the ICA attenuation in spectral detector CTA of the head and neck. The reported models are a promising tool to leverage the improved image quality of these images in clinical routine.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zopfs, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Lennartz, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Abdullayev, Nuran UNSPECIFIED orcid.org/0000-0003-4522-537X UNSPECIFIED Lichtenstein, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Laukamp, Kai Roman UNSPECIFIED UNSPECIFIED UNSPECIFIED Reimer, Robert Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Kabbasch, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Borggrefe, Jan UNSPECIFIED orcid.org/0000-0003-2908-7560 UNSPECIFIED Schlamann, Marc UNSPECIFIED UNSPECIFIED UNSPECIFIED Neuhaus, Victor UNSPECIFIED UNSPECIFIED UNSPECIFIED Hokamp, Nils Grosse UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-583773
DOI:	10.21037/qims-20-1140
Journal or Publication Title:	Quant. Imaging Med. Surg.
Volume:	11
Number:	8
Page Range:	S. 3408 - 3418
Date:	2021
Publisher:	AME PUBL CO
Place of Publication:	SHATIN
ISSN:	2223-4306
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ENERGY CT; COMPUTED-TOMOGRAPHY; IMAGE QUALITY; OPTIMIZATION; PRINCIPLES; STANDARD; STROKE; ARTERY Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58377