Universität zu Köln

Zopfs, David, Lennartz, Simon, Pennig, Lenhard, Glauner, Andreas, Abdullayev, Nuran ORCID: 0000-0003-4522-537X, Bremm, Johannes, Hokamp, Nils Grosse, Persigehl, Thorsten, Kabbasch, Christoph, Borggrefe, Jan ORCID: 0000-0003-2908-7560 and Laukamp, Kai Roman (2020). Virtual monoenergetic images and post-processing algorithms effectively reduce CT artifacts from intracranial aneurysm treatment. Sci Rep, 10 (1). LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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Abstract

To evaluate artifact reduction by virtual monoenergetic images (VMI) and metal artifact reduction algorithms (MAR) as well as the combination of both approaches (VMIMAR) compared to conventional CT images (CI) as standard of reference. In this retrospective study, 35 patients were included who underwent spectral-detector CT (SDCT) with additional MAR-reconstructions due to artifacts from coils or clips. CI, VMI, MAR and VMIMAR (range: 100-200keV, 10keV-increment) were reconstructed. Region-of-interest based objective analysis was performed by assessing mean and standard deviation of attenuation (HU) in hypo- and hyperdense artifacts from coils and clips. Visually, extent of artifact reduction and diagnostic assessment were rated. Compared to CI, VMI >= 100keV, MAR and VMIMAR between 100-200keV increased attenuation in hypoattenuating artifacts (CI/VMI200keV/MAR/VMIMAR200keV, HU: -77.6 +/- 81.1/-65.1 +/- 103.2/-36.9 +/- 27.7/-21.1 +/- 26.7) and decreased attenuation in hyperattenuating artifacts (HU: 47.4 +/- 32.3/42.1 +/- 50.2/29.5 +/- 18.9/20.8 +/- 25.8). However, differences were only significant for MAR in hypodense and VMIMAR in hypo- and hyperdense artifacts (p<0.05). Visually, hypo- and hyperdense artifacts were significantly reduced compared to CI by VMI >= 140/100keV, MAR and VMIMAR >= 100keV. Diagnostic assessment of surrounding brain tissue was significantly improved in VMI >= 100keV, MAR and VMIMAR >= 100keV. The combination of VMI and MAR facilitates a significant reduction of artifacts adjacent to intracranial coils and clips. Hence, if available, these techniques should be combined for optimal reduction of artifacts following intracranial aneurysm treatment.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zopfs, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Lennartz, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Pennig, Lenhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Glauner, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Abdullayev, Nuran UNSPECIFIED orcid.org/0000-0003-4522-537X UNSPECIFIED Bremm, Johannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Hokamp, Nils Grosse UNSPECIFIED UNSPECIFIED UNSPECIFIED Persigehl, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Kabbasch, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Borggrefe, Jan UNSPECIFIED orcid.org/0000-0003-2908-7560 UNSPECIFIED Laukamp, Kai Roman UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-336694
DOI:	10.1038/s41598-020-63574-8
Journal or Publication Title:	Sci Rep
Volume:	10
Number:	1
Date:	2020
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DUAL-ENERGY CT; ORTHOPEDIC HARDWARE; FOLLOW-UP; ANGIOGRAPHY; IMPLANTS; COILING; QUALITY Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33669