Quarter-millimeter spectral coronary stent imaging with photon-counting CT: Initial experience

Symons, Rolf; Bruecker, Yves De; Roosen, John; Camp, Laurent Van; Cork, Tyler E.; Kappler, S.; Ulzheimer, Stefan; Sandfort, Veit; Bluemke, David A.; Pourmorteza, Amir

doi:10.1016/j.jcct.2018.10.008

Cited by 59 publications

(50 citation statements)

References 33 publications

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“…This is especially important in small stent evaluation, where two highly attenuating materials (iodine and stent metal) are present. Recent studies have shown the utility of high-spatialresolution multienergy cardiovascular photon-counting CT in reducing blooming in human hearts (68) (Fig 15) and in coronary stents (69) (Fig 17).…”

Section: Artifactsmentioning

confidence: 99%

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Photon-counting CT: Technical Principles and Clinical Prospects

et al. 2018

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Photon-counting CT is an emerging technology with the potential to dramatically change clinical CT. Photon-counting CT uses new energy-resolving x-ray detectors, with mechanisms that differ substantially from those of conventional energy-integrating detectors. Photon-counting CT detectors count the number of incoming photons and measure photon energy. This technique results in higher contrast-to-noise ratio, improved spatial resolution, and optimized spectral imaging. Photon-counting CT can reduce radiation exposure, reconstruct images at a higher resolution, correct beam-hardening artifacts, optimize the use of contrast agents, and create opportunities for quantitative imaging relative to current CT technology. In this review, the authors will explain the technical principles of photon-counting CT in nonmathematical terms for radiologists and clinicians. Following a general overview of the current status of photon-counting CT, they will explain potential clinical applications of this technology.

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Section: Artifactsmentioning

confidence: 99%

“…All images were reconstructed by using optimized convolution kernels and filtered backprojection algorithm. (Images from National Institutes of Health [69]. )…”

Section: Contrast Agentsmentioning

confidence: 99%

Photon-counting CT: Technical Principles and Clinical Prospects

et al. 2018

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“…These have demonstrated not only the ability to produce images with higher spatial resolution, as expected from the smaller pixel size, but also the clinical value of such images. 10,12,[34][35][36][37] Higher spatial resolution is expected to improve the diagnostic quality in several CT applications, including imaging of the temporal bone, lung nodule characterization, visualization of calcified plaques, and imaging of bone fractures in trauma patients. 6 Here, we aim to demonstrate that deep silicon-based, photon-counting detectors offer similar benefits in terms of image resolution and thus that silicon may constitute a viable alternative for future photon-counting CT detectors.…”

Section: Introductionmentioning

confidence: 99%

Resolution characterization of a silicon-based, photon-counting computed tomography prototype capable of patient scanning

et al. 2019

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Photon-counting detectors are expected to bring a range of improvements to patient imaging with x-ray computed tomography (CT). One is higher spatial resolution. We demonstrate the resolution obtained using a commercial CT scanner where the original energy-integrating detector has been replaced by a singleslice, silicon-based, photon-counting detector. This prototype constitutes the first full-field-of-view silicon-based CT scanner capable of patient scanning. First, the pixel response function and focal spot profile are measured and, combining the two, the system modulation transfer function is calculated. Second, the prototype is used to scan a resolution phantom and a skull phantom. The resolution images are compared to images from a state-ofthe-art CT scanner. The comparison shows that for the prototype 19 lp∕cm are detectable with the same clarity as 14 lp∕cm on the reference scanner at equal dose and reconstruction grid, with more line pairs visible with increasing dose and decreasing image pixel size. The high spatial resolution remains evident in the anatomy of the skull phantom and is comparable to that of other photon-counting CT prototypes present in the literature. We conclude that the deep silicon-based detector used in our study could provide improved spatial resolution in patient imaging without increasing the x-ray dose.

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“…The high-resolution capabilities of photon-counting CT for coronary stent imaging were confirmed in several studies. In a phantom experiment, Symons et al [55] demonstrated significantly improved coronary stent lumen visibility with the "UHR mode". Von Spiczak et al [62] found superior qualitative and quantitative image characteristics for photon-counting coronary photon-counting detector image, "sharp mode", demonstrating higher spatial resolution and significantly improved visualization of bony structures.…”

Section: Pre-clinical Evaluation Of Photon-counting Ctmentioning

confidence: 99%

Basic principles and clinical potential of photon-counting detector CT

et al. 2020

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Photon-counting detectors are a new technology for future computed tomography (CT) systems, with the potential to overcome major limitations of conventional CT detectors. They provide energy-resolved CT data at very high spatial resolution without electronic noise. This review article gives an overview of the basic principles of photon-counting detector CT, of potential benefits and limitations, and of the clinical experience gained so far in pre-clinical installations.

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Quarter-millimeter spectral coronary stent imaging with photon-counting CT: Initial experience

Cited by 59 publications

References 33 publications

Photon-counting CT: Technical Principles and Clinical Prospects

Photon-counting CT: Technical Principles and Clinical Prospects

Resolution characterization of a silicon-based, photon-counting computed tomography prototype capable of patient scanning

Basic principles and clinical potential of photon-counting detector CT

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