Results 21 to 30 of about 6,942,219 (182)

Investigation on the proton range uncertainty with spectral CT-based virtual monoenergetic images. [PDF]

J Appl Clin Med Phys, 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 ...
Zhu L, Du Y, Peng Y, Xiang X, Wang X.
europepmc   +3 more sources

Virtual monoenergetic micro-CT imaging in mice with artificial intelligence [PDF]

Scientific Reports, 2022
AbstractMicro cone-beam computed tomography (µCBCT) imaging is of utmost importance for carrying out extensive preclinical research in rodents. The imaging of animals is an essential step prior to preclinical precision irradiation, but also in the longitudinal assessment of treatment outcomes.
van der Heyden, Brent, Roden, Stijn, Dok, Rueveyda, Nuyts, Sandra, Sterpin, Edmond   +4 more
openaire   +3 more sources

Virtual monoenergetic images by spectral detector computed tomography may improve image quality and diagnostic ability for ischemic lesions in acute ischemic stroke. [PDF]

Acta Radiol, 2023
Background: Acute ischemic lesions are challenging to detect by conventional computed tomography (CT). Virtual monoenergetic images may improve detection rates by increased tissue contrast.
Mellander H, Bengtsson P, Fransson V, Ramgren B, Undrén P, Drake M, Ydström K, Lätt J, Hilal A, Wassélius J, Ullberg T.   +10 more
europepmc   +3 more sources

Reducing contrast dose using virtual monoenergetic imaging for aortic CTA [PDF]

Journal of Applied Clinical Medical Physics, 2020
AbstractThree‐dimensional computed tomographic angiography (3D‐CTA) is widely used to evaluate the inner diameters of vessels and the anatomical vascular structure prior to endoscopic aortic surgery or transcatheter valve implantation. Virtual monoenergetic imaging (VMI) is a new application in dual‐energy CT (DECT).
Yoshida, Ryoichi, Usui, Keisuke, Katsunuma, Yasushi, Honda, Hiroshi, Hatakeyama, Koki   +4 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

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

Cancers (Basel), 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 A, Laqua FC, Cester D, Lohaus N, Sartoretti T, Pinto Dos Santos D, Alkadhi H, Baessler B.   +7 more
europepmc   +4 more sources

Imaging of intracranial hemorrhage in photon counting computed tomography using virtual monoenergetic images. [PDF]

Neuroradiology
Abstract Purpose To determine the optimal virtual monoenergetic image (VMI) for detecting and assessing intracranial hemorrhage in unenhanced photon counting CT of the head based on the evaluation of quantitative and qualitative image quality parameters.
Schoenbeck D, Sacha A, Niehoff JH, Moenninghoff C, Borggrefe J, Horstmeier S, Surov A, Shahzadi I, Knappe U, Kroeger JR, Michael AE.   +10 more
europepmc   +4 more sources

Virtual monoenergetic imaging predicting Ki-67 expression in lung cancer

Scientific Reports, 2023
Abstract This study aimed to optimize slope and energy levels for evaluating Ki-67 expression in lung cancer using virtual monoenergetic imaging and compare the predictive efficiency of different energy spectrum slopes (λHU) for Ki-67.
Peipei Dou, Hengliang Zhao, Dan Zhong, Yingliang Hu, Bin Liu, Haiyan Zhang, Aihong Cao   +6 more
openaire   +3 more sources

Electron Density Dual-energy CT for Liver Metastasis Detection Compared with Conventional and Virtual Monoenergetic Images at 40 keV. [PDF]

Curr Med Imaging
Objective: To estimate the contrast-to-noise ratio (CNR) of liver metastases with electron density (ED) derived from dual-energy computed tomography and compare it with conventional and virtual monoenergetic ...
Chabrier C, Leroy M, Ernst PO.
europepmc   +2 more sources

Dual-Energy Computed Tomography Applications to Reduce Metal Artifacts in Hip Prostheses: A Phantom Study

Diagnostics, 2022
Metal components of hip prostheses cause severe artifacts in CT images, influencing diagnostic accuracy. Metal artifact reduction (MAR) software and virtual monoenergetic reconstructions on dual-energy CT (DECT) systems are possible solutions that should
Daniele Conti, Fabio Baruffaldi, Paolo Erani, Anna Festa, Stefano Durante, Miriam Santoro   +5 more
doaj   +1 more source