Low-Dose Dual-Source CT Angiography With Iterative Reconstruction for Coronary Artery Stent Evaluation

Eisentopf, Jasmin; Achenbach, Stephan; Ulzheimer, Stefan; Layritz, Christian; Wuest, Wolfgang; May, Matthias; Lell, Michael; Ropers, Dieter; Klinghammer, Lutz; Daniel, Werner G.; Pflederer, Tobias

doi:10.1016/j.jcmg.2012.10.023

Cited by 54 publications

(36 citation statements)

References 22 publications

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“…This is of particular interest as a recent study demonstrated the feasibility of even low-dose CTA, however bearing limited evaluation capabilities regarding stents of less than 3 mm in diameter (13). In the current study, the stent diameter ranged from 2.25 to 4.0 mm.…”

Section: Discussionmentioning

confidence: 85%

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In Vitro Comparison of Second- and Third-generation Dual-source CT for Coronary Stent Visualization at Different Tube Potentials

et al. 2016

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Section: Discussionmentioning

confidence: 85%

“…These advances were accompanied by reduced radiation exposure, eventually leading to lowdose coronary CTA with still acceptable image quality and sufficient predictive values even for the detection of in-stent stenosis (13).…”

Section: Introductionmentioning

confidence: 99%

In Vitro Comparison of Second- and Third-generation Dual-source CT for Coronary Stent Visualization at Different Tube Potentials

et al. 2016

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“…Data from our study show that using conventional filtered back projection as the reconstruction method, an edge-enhancing kernel allows significantly less stent blooming and better image quality than a standard smooth kernel. Iterative reconstruction is a novel reconstruction method which reduces image noise [34] and can improve stent imaging [35][36][37]. Further studies could investigate the specific impact of iterative reconstruction on the effect of sharp versus smooth kernels in stent CT imaging.…”

Section: Discussionmentioning

confidence: 99%

Coronary Stent Artifact Reduction With an Edge-Enhancing Reconstruction Kernel - A Prospective Cross-Sectional Study With 256-Slice Ct

Tan¹,

Soulez²,

Stevens³

et al. 2015

Canadian Journal of Cardiology

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PurposeMetallic artifacts can result in an artificial thickening of the coronary stent wall which can significantly impair computed tomography (CT) imaging in patients with coronary stents. The objective of this study is to assess in vivo visualization of coronary stent wall and lumen with an edge-enhancing CT reconstruction kernel, as compared to a standard kernel. MethodsThis is a prospective cross-sectional study involving the assessment of 71 coronary stents (24 patients), with blinded observers. After 256-slice CT angiography, image reconstruction was done with medium-smooth and edge-enhancing kernels. Stent wall thickness was measured with both orthogonal and circumference methods, averaging thickness from diameter and circumference measurements, respectively. Image quality was assessed quantitatively using objective parameters (noise, signal to noise (SNR) and contrast to noise (CNR) ratios), as well as visually using a 5-point Likert scale. ResultsStent wall thickness was decreased with the edge-enhancing kernel in comparison to the standard kernel, either with the orthogonal (0.97 ± 0.02 versus 1.09 ± 0.03 mm, respectively; p<0.001) or the circumference method (1.13 ± 0.02 versus 1.21 ± 0.02 mm, respectively; p = 0.001). The edge-enhancing kernel generated less overestimation from nominal thickness compared to the standard kernel, both with the orthogonal (0.89 ± 0.19 versus 1.00 ± 0.26 mm, respectively; p<0.001) and the circumference (1.06 ± 0.26 versus 1.13 ± 0. mm, respectively; p = 0.005) methods. The edge-enhancing kernel was associated with lower SNR and CNR, as well as higher background noise (all p < 0.001), in comparison to the medium-smooth kernel. Stent visual scores were higher with the edge-enhancing kernel (p<0.001). ConclusionIn vivo 256-slice CT assessment of coronary stents shows that the edge-enhancing CT reconstruction kernel generates thinner stent walls, less overestimation from nominal thickness, and better image quality scores than the standard kernel.

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“…Inclusion and exclusion criteria have been reported previously. 11 Stent-specific exclusion criteria were previous stent-in-stent placement, as well as stent implantation in bifurcation lesions. All patients gave written informed consent, and the study was approved by the institutional review board.…”

Section: Methodsmentioning

confidence: 99%

Stent evaluation in low-dose coronary CT angiography: Effect of different iterative reconstruction settings

Wuest

May

Scharf

et al. 2013

Journal of Cardiovascular Computed Tomography

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Low-Dose Dual-Source CT Angiography With Iterative Reconstruction for Coronary Artery Stent Evaluation

Abstract: In selected patients, prospectively electrocardiography-triggered image acquisition with 80-kV tube voltage and low current in combination with IR permits the evaluation of patients with implanted coronary artery stents with reasonable diagnostic accuracy at very low radiation exposure.

Cited by 54 publications

References 22 publications

In Vitro Comparison of Second- and Third-generation Dual-source CT for Coronary Stent Visualization at Different Tube Potentials

In Vitro Comparison of Second- and Third-generation Dual-source CT for Coronary Stent Visualization at Different Tube Potentials

Coronary Stent Artifact Reduction With an Edge-Enhancing Reconstruction Kernel - A Prospective Cross-Sectional Study With 256-Slice Ct

Stent evaluation in low-dose coronary CT angiography: Effect of different iterative reconstruction settings

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