Universität zu Köln

Al-Baldawi, Y., Hokamp, N. Grosse, Haneder, S., Steinhauser, S., Puesken, M., Persigehl, T., Maintz, D. and Wybranski, C. (2020). Virtual mono-energetic images and iterative image reconstruction: abdominal vessel imaging in the era of spectral detector CT. Clin. Radiol., 75 (8). LONDON: W B SAUNDERS CO LTD. ISSN 1365-229X

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Abstract

AIM: To compare the quality of virtual mono-energetic (VMI) and polychromatic images reconstructed with hybrid iterative (PCIHIR) or model-based reconstruction (PCIMBR) derived from dual-layer spectral detector computed tomography (SDCT) in arterial phase images to visualise the aorta and abdominal main branches. MATERIAL AND METHODS: A retrospective review of 50 patients with abdominal arterial phase scans was undertaken. Attenuation, intraluminal noise, and signal-/contrast-to-noise ratio (S-/CNR) were assessed in the PCIHIR, PCIMBR and VMI40keV, VMI70keV, and VMI100keV images. Contrast, noise, and visualization of soft-plaque, and macro-/micro-calcifications were scored in a blinded reading by two radiologists. RESULTS: VMI40keV yielded highest S-/CNR (p <= 0.001). VMI70keV and PCIMBR showed comparable SNR (p >= 0.999) and yielded higher SNR than PCIHIR. VMI70keV yielded higher CNR than PCIHIR (p<0.001) and PCIMBR (p<0.045). VMI100keV yielded lowest CNR (p <= 0.001) and SNR (p <= 0.104). In the subjective analysis, VMI40keV outperformed PCIMBR for contrast and noise, PCIMBR scored better than VMI70keV, and the latter scored better than PCIHIR for these categories (all p<0.001). PCIMBR was superior for depiction of soft-plaque and micro-calcifications (p<0.001). VMI100keV visualized micro-calcifications second best (p<0.001) and matched PCIMBR for the depiction of macro-calcifications (p>0.999), while VMI40keV scored second best for depiction of soft-plaque (p<0.020). CONCLUSIONS: VMI40keV and VMI70keV yield better S-/CNR than PCIHIR and PCIMBR; however, PCIMBR visualized arteriosclerotic plaques best, followed by VMI40keV for depiction of soft-plaque and VMI100keV for macro- and micro-calcification. Based on the present findings, PCIMBR on conventional CT and VMI40keV supplemented by VMI100keV on SDCT are recommended for the diagnostic assessment of abdominal arteries. (C) 2020 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Al-Baldawi, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hokamp, N. Grosse UNSPECIFIED UNSPECIFIED UNSPECIFIED Haneder, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Steinhauser, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Puesken, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persigehl, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wybranski, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-325257
DOI:	10.1016/j.crad.2020.03.036
Journal or Publication Title:	Clin. Radiol.
Volume:	75
Number:	8
Date:	2020
Publisher:	W B SAUNDERS CO LTD
Place of Publication:	LONDON
ISSN:	1365-229X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DUAL-ENERGY CT; COMPUTED-TOMOGRAPHY; WINDOW SETTINGS; QUALITY; QUANTIFICATION; OPTIMIZATION Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32525