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. 2019 Dec 27;9:19850. doi: 10.1038/s41598-019-56427-6

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Representative conventional HU images acquired on the B64, the IQon, and the SPCCT of the three stents in vitro in water. Transverse views of the stents at similar locations in the absence (first row) and presence of calcification (second row). The better spatial resolution of the SPPCT system results in an improved visualization of the stent metallic struts. On the SPCCT images the stents can be visually separated from the calcification, while this separation is not possible on the B64 and IQon images due to larger detector size. A 5 mm scale bar is shown on the transverse views.