Addressing CT metal artifacts using photon-counting detectors and one-step spectral CT image reconstruction.
Sign Up to like & getrecommendations! Published in 2022 at "Medical physics"
DOI: 10.1002/mp.15621
Abstract: PURPOSE The constrained One-Step Spectral CT Image Reconstruction (cOSSCIR) algorithm with a non-convex alternating direction method of multipliers (ADMM) optimizer is proposed for addressing CT metal artifacts caused by beam hardening, noise, and photon starvation.… read more here.
Keywords: cosscir; photon counting; metal artifacts; algorithm ... See more keywords
Photon-Counting CT: A Quantum Leap in Diagnostic Imaging?!
Sign Up to like & getrecommendations! Published in 2022 at "Clinical Neuroradiology"
DOI: 10.1007/s00062-022-01145-2
Abstract: When I started my education in neuroradiology almost 30 years ago, there was conventional x-ray, angiography, computed tomography (CT), and magnetic resonance imaging (MRI). Truth be told, I did not expect to see a new… read more here.
Keywords: quantum leap; photon counting; counting quantum; diagnostic imaging ... See more keywords
Comparison of image quality between spectral photon-counting CT and dual-layer CT for the evaluation of lung nodules: a phantom study
Sign Up to like & getrecommendations! Published in 2021 at "European Radiology"
DOI: 10.1007/s00330-021-08103-5
Abstract: To evaluate the image quality (IQ) of a spectral photon-counting CT (SPCCT) using filtered back projection (FBP) and hybrid iterative reconstruction (IR) algorithms (iDose4), in comparison with a dual-layer CT (DLCT) system, and to choose… read more here.
Keywords: image; lung nodules; lung; photon counting ... See more keywords
Improved coronary calcium detection and quantification with low-dose full field-of-view photon-counting CT: a phantom study
Sign Up to like & getrecommendations! Published in 2022 at "European Radiology"
DOI: 10.1007/s00330-021-08421-8
Abstract: The aim of the current study was to systematically assess coronary artery calcium (CAC) detection and quantification for spectral photon-counting CT (SPCCT) in comparison to conventional CT and, in addition, to evaluate the possibility of… read more here.
Keywords: radiation dose; photon counting; detection; calcium ... See more keywords
Studies on Terahertz Photon Counting Detectors with Low-Leakage SIS Junctions
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Low Temperature Physics"
DOI: 10.1007/s10909-019-02149-y
Abstract: We plan to realize a fast terahertz photon counting detector. The detector may resolve each photon signal from the source and enable us to introduce “photon statistics,” which will be a new measure for terahertz… read more here.
Keywords: sis; photon counting; photon; terahertz photon ... See more keywords
Iodine contrast-to-noise ratio improvement at unit dose and contrast media volume reduction in whole-body photon-counting CT.
Sign Up to like & getrecommendations! Published in 2020 at "European journal of radiology"
DOI: 10.1016/j.ejrad.2020.108909
Abstract: PURPOSE To assess the dose-normalized iodine contrast-to-noise-ratio (CNRD) improvement and contrast media reduction potential obtained with photon-counting (PC) CT compared to conventional energy-integrating (EI) CT as a function of patient size and tube voltage. METHOD… read more here.
Keywords: reduction; improvement; contrast; contrast media ... See more keywords
Channel model and performance analysis of long-range deep sea wireless photon-counting communication
Sign Up to like & getrecommendations! Published in 2020 at "Optics Communications"
DOI: 10.1016/j.optcom.2020.125989
Abstract: Abstract It is widely accepted that the optical signal rapidly attenuates to a level of few photons after being transmitted over several hundred meters in seawater due to the strong absorption and scattering effects. Therefore,… read more here.
Keywords: deep sea; range; photon counting; communication ... See more keywords
The Role of Metal-Semiconductor Interface in Halide Perovskite Devices for Radiation Photon Counting.
Sign Up to like & getrecommendations! Published in 2020 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.0c11805
Abstract: Halide perovskites are promising optoelectronic semiconductors. For applications in solid-state detectors which operate in low photon flux counting mode, blocking interfaces are essential to minimize the dark current noise. Here, we investigate the interface between… read more here.
Keywords: solid state; role; interface; halide ... See more keywords
High-speed photon-counting laser ranging for broad range of distances
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-22675-1
Abstract: We demonstrate a high-speed photon-counting laser ranging system with laser pulses of multiple repetition rates to extend the unambiguous range. In the experiment, the laser pulses of three different repetition rates around 10 MHz were employed… read more here.
Keywords: laser; range; counting laser; laser ranging ... See more keywords
Assessment of candidate elements for development of spectral photon-counting CT specific contrast agents
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-30570-y
Abstract: Spectral photon-counting computed tomography (SPCCT) is a rapidly emerging imaging modality that provides energy-dependent information on individual x-ray photons, leading to accurate material decomposition and simultaneous quantification of multiple contrast generating materials. Development of SPCCT-specific… read more here.
Keywords: contrast agents; contrast; development; photon counting ... See more keywords
Feasibility of improving vascular imaging in the presence of metallic stents using spectral photon counting CT and K-edge imaging
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-56427-6
Abstract: Correct visualization of the vascular lumen is impaired in standard computed tomography (CT) because of blooming artifacts, increase of apparent size, induced by metallic stents and vascular calcifications. Recently, due to the introduction of photon-counting… read more here.
Keywords: photon; improving vascular; feasibility; metallic stents ... See more keywords