Results 21 to 30 of about 5,344,290 (172)

Photon-counting detector coronary CT angiography: impact of virtual monoenergetic imaging and iterative reconstruction on image quality. [PDF]

Br J Radiol, 2023
Objectives: To assess the impact of low kilo-electronvolt (keV) virtual monoenergetic image (VMI) energies and iterative reconstruction on image quality of clinical photon-counting detector coronary CT angiography (CCTA). Methods: CCTA with PCD-CT (prospective ECG-triggering, 120 kVp, automatic tube current modulation) was performed in a high-end ...
Sartoretti T, McDermott M, Mergen V, Euler A, Schmidt B, Jost G, Wildberger JE, Alkadhi H.   +7 more
europepmc   +4 more sources

Improved Discriminability of Severe Lung Injury and Atelectasis in Thoracic Trauma at Low keV Virtual Monoenergetic Images from Photon-Counting Detector CT

Diagnostics
Objectives: To evaluate the value of virtual monoenergetic images (VMI) from photon-counting detector CT (PCD-CT) for discriminability of severe lung injury and atelectasis in polytraumatized patients.
Hanns Leonhard Kaatsch, Maximilian Franz Völlmecke, Benjamin V. Becker, Daniel Dillinger, Laura Kubitscheck, Aliona Wöhler, Sebastian Schaaf, Joel Piechotka, Christof Schreyer, Robert Schwab, Daniel Overhoff, Stephan Waldeck   +11 more
doaj   +2 more sources

Understanding Photon-Counting CT: Physics, Detector Technology, and Image Reconstructions [PDF]

Sensors
Photon-counting computed tomography (PCCT) represents a detector-level transformation in CT imaging. Unlike conventional energy-integrating detectors, photon-counting detectors directly convert individual X-ray interactions into electrical pulses and ...
Arosh Shavinda Perera Molligoda Arachchige, Fatemeh Darvizeh   +1 more
doaj   +2 more sources

Generation of quasi-monoenergetic protons from thin multi-ion foils by a combination of laser radiation pressure acceleration and shielded Coulomb repulsion [PDF]

, 2013
We study theoretically and numerically the acceleration of protons by a combination of laser radiation pressure acceleration and Coulomb repulsion of carbon ions in a multi-ion thin foil made of carbon and hydrogen.
He, Minqing, Wang, Jyhpung, Liu, Tung-Chang, Shao, Xi, Chen, Shih-Hung, Liu, Chuan-Sheng, Su, Jao-Jang, Eliasson, Bengt, Tripathi, Vipin   +8 more
core   +6 more sources

Virtual Monoenergetic Images of Dual-Energy CT—Impact on Repeatability, Reproducibility, and Classification in Radiomics [PDF]

Cancers, 2021
The purpose of this study was to (i) evaluate the test–retest repeatability and reproducibility of radiomic features in virtual monoenergetic images (VMI) from dual-energy CT (DECT) depending on VMI energy (40, 50, 75, 120, 190 keV), radiation dose (5 and 15 mGy), and DECT approach (dual-source and split-filter DECT) in a phantom (ex vivo), and (ii) to
Euler, André, Laqua, Fabian Christopher, Cester, Davide, Lohaus, Niklas, Sartoretti, Thomas, Dos Santos, Daniel Pinto, Alkadhi, Hatem, Baessler, Bettina   +7 more
openaire   +2 more sources

Quantitative benchmarking of iodine imaging for two CT spectral imaging technologies: a phantom study

European Radiology Experimental, 2021
Background The aim of this study was to quantitatively benchmark iodine imaging across specific virtual monoenergetic energy levels, iodine maps and virtual non-contrast images with different phantom sizes and iodine concentrations, using a rapid ...
Vanja Harsaker, Kristin Jensen, Hilde Kjernlie Andersen, Anne Catrine Martinsen   +3 more
doaj   +1 more source

Dual-Energy CT of the Heart: A Review

Journal of Imaging, 2022
Dual-energy computed tomography (DECT) represents an emerging imaging technique which consists of the acquisition of two separate datasets utilizing two different X-ray spectra energies.
Serena Dell’Aversana, Raffaele Ascione, Marco De Giorgi, Davide Raffaele De Lucia, Renato Cuocolo, Marco Boccalatte, Gerolamo Sibilio, Giovanni Napolitano, Giuseppe Muscogiuri, Sandro Sironi, Giuseppe Di Costanzo, Enrico Cavaglià, Massimo Imbriaco, Andrea Ponsiglione   +13 more
doaj   +1 more source

The value of dual-energy computed tomography angiography-based virtual monoenergetic imaging for evaluations after cerebral aneurysm clipping. [PDF]

Diagn Interv Radiol
PURPOSE: This study aimed to research the optimal energy range of dual-energy computed tomography angiography (DECTA)-based virtual monoenergetic imaging (VMI) for evaluations after cerebral aneurysm clipping. METHODS: Sixty patients who underwent DECTA
Lu Z, Wu S, Wu F, Jin Q, Huang Q, Zhang B.   +5 more
europepmc   +2 more sources

Dual-Energy CT in the Acute Setting: Bowel Trauma

Frontiers in Radiology, 2022
Traumatic bowel and mesenteric injuries (TBMI) have significant morbidity and mortality. The physical examination is often limited and sometimes not feasible in the trauma patient.
Tanche Jimmy Wang, Sarah Barrett, Ismail Ali, Faisal Khosa, Savvas Nicolaou, Nicolas Murray   +5 more
doaj   +1 more source

Investigation on the proton range uncertainty with spectral CT‐based virtual monoenergetic images

Journal of Applied Clinical Medical Physics, 2023
AbstractObjectiveThe stopping power ratio (SPR) prediction error will contribute to the range uncertainty of proton therapy. Spectral CT is promising in reducing the uncertainty in SPR estimation. The purpose of this research is to determine the optimal energy pairs of SPR prediction for each tissue and to evaluate the dose distribution and range ...
Li Zhu, Yi Du, Yahui Peng, Xincheng Xiang, Xiangang Wang   +4 more
openaire   +2 more sources