Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention

Abstract In this study, the optimal monochromatic energy level in dual-energy spectral CT required for imaging coronary stents after percutaneous coronary intervention (PCI) was explored. Thirty-five consecutive patients after PCI were examined using the dual-energy spectral CT imaging mode. The ori...

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Autores principales:	Qian Liu, Yajuan Wang, Haicheng Qi, Yaohui Yu, Yan Xing
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/08844a0e2587422a800a3d0875c19363
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spelling	oai:doaj.org-article:08844a0e2587422a800a3d0875c193632021-12-02T17:51:26ZExploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention10.1038/s41598-021-97035-72045-2322https://doaj.org/article/08844a0e2587422a800a3d0875c193632021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97035-7https://doaj.org/toc/2045-2322Abstract In this study, the optimal monochromatic energy level in dual-energy spectral CT required for imaging coronary stents after percutaneous coronary intervention (PCI) was explored. Thirty-five consecutive patients after PCI were examined using the dual-energy spectral CT imaging mode. The original images were reconstructed at 40–140 keV (10-keV interval) monochromatic levels. The in-stent and out-stent CT values at each monochromatic level were measured to calculate the signal-to-noise ratio(SNR) and contrast-to-noise ratio (CNR) for the vessel and the CT value difference between the in-stent and out-stent lumen (dCT (in–out)), which reflects the artificial CT number increase due to the beam hardening effect caused by the stents. The subjective image quality of the stent and in-stent vessel was evaluated by two radiologists using a 5-point scale. With the increase in energy level, the CT value, SNR, CNR, and dCT (in–out) all decreased. At 80 keV, the mean CT value in-stent reached (345.24 ± 93.43) HU and dCT (in–out) started plateauing. In addition, the subjective image quality of the stents and vessels peaked at 80 keV. The 80 keV monochromatic images are optimal for imaging cardiac patients with stents after PCI, balancing the enhancement and SNR and CNR in the vessels while minimizing the beam hardening artifacts caused by the stents.Qian LiuYajuan WangHaicheng QiYaohui YuYan XingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qian Liu Yajuan Wang Haicheng Qi Yaohui Yu Yan Xing Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
description	Abstract In this study, the optimal monochromatic energy level in dual-energy spectral CT required for imaging coronary stents after percutaneous coronary intervention (PCI) was explored. Thirty-five consecutive patients after PCI were examined using the dual-energy spectral CT imaging mode. The original images were reconstructed at 40–140 keV (10-keV interval) monochromatic levels. The in-stent and out-stent CT values at each monochromatic level were measured to calculate the signal-to-noise ratio(SNR) and contrast-to-noise ratio (CNR) for the vessel and the CT value difference between the in-stent and out-stent lumen (dCT (in–out)), which reflects the artificial CT number increase due to the beam hardening effect caused by the stents. The subjective image quality of the stent and in-stent vessel was evaluated by two radiologists using a 5-point scale. With the increase in energy level, the CT value, SNR, CNR, and dCT (in–out) all decreased. At 80 keV, the mean CT value in-stent reached (345.24 ± 93.43) HU and dCT (in–out) started plateauing. In addition, the subjective image quality of the stents and vessels peaked at 80 keV. The 80 keV monochromatic images are optimal for imaging cardiac patients with stents after PCI, balancing the enhancement and SNR and CNR in the vessels while minimizing the beam hardening artifacts caused by the stents.
format	article
author	Qian Liu Yajuan Wang Haicheng Qi Yaohui Yu Yan Xing
author_facet	Qian Liu Yajuan Wang Haicheng Qi Yaohui Yu Yan Xing
author_sort	Qian Liu
title	Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
title_short	Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
title_full	Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
title_fullStr	Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
title_full_unstemmed	Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
title_sort	exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/08844a0e2587422a800a3d0875c19363
work_keys_str_mv	AT qianliu exploringthebestmonochromaticenergylevelindualenergyspectralimagingforcoronarystentsafterpercutaneouscoronaryintervention AT yajuanwang exploringthebestmonochromaticenergylevelindualenergyspectralimagingforcoronarystentsafterpercutaneouscoronaryintervention AT haichengqi exploringthebestmonochromaticenergylevelindualenergyspectralimagingforcoronarystentsafterpercutaneouscoronaryintervention AT yaohuiyu exploringthebestmonochromaticenergylevelindualenergyspectralimagingforcoronarystentsafterpercutaneouscoronaryintervention AT yanxing exploringthebestmonochromaticenergylevelindualenergyspectralimagingforcoronarystentsafterpercutaneouscoronaryintervention
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Exploring the best monochromatic energy level in dual energy spectral imaging for coronary stents after percutaneous coronary intervention

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