Results 21 to 30 of about 6,210,221 (335)

Assessment of CT Imaging Protocols Impacts on Calculation of Point Dose in Water Phantom using Radiotherapy Treatment Planning System

Frontiers in Biomedical Technologies, 2020
Purpose: Point dose calculation in the Treatment Planning System (TPS) is performed using Computed Tomography (CT) images because CT images data have the tissue electron density information.
Gholamreza Fallah Mohammadi, Ehsan Mihandoost   +1 more
doaj   +1 more source

Modified Contrast-Detail Phantom for Determination of the CT Scanners Abilities for Low-Contrast Detection

Applied Sciences, 2021
Computerised tomography (CT) continues to be a corner stone medical and radiologic imaging modalities in radiology and radiotherapy departments. Its importance lies in its efficiency in low contrast detectability (LCD).
Moshi Geso, Salem Saeed Alghamdi, Abdulrahman Tajaldeen, Rowa Aljondi, Hind Alghamdi, Ali Zailae, Essam H. Mattar, Nissren Tamam, Abdullah Aljehani, Hiba Omer, Abdelmoneim Sulieman   +10 more
doaj   +1 more source

Automatic phantom test pattern classification through transfer learning with deep neural networks [PDF]

, 2020
Imaging phantoms are test patterns used to measure image quality in computer tomography (CT) systems. A new phantom platform (Mercury Phantom, Gammex) provides test patterns for estimating the task transfer function (TTF) or noise power spectrum (NPF) and simulates different patient sizes.
arxiv   +1 more source

Standardization of 123I-meta-iodobenzylguanidine myocardial sympathetic activity imaging: phantom calibration and clinical applications

Clinical and translational imaging, 2017
PurposeMyocardial sympathetic imaging with 123I-meta-iodobenzylguanidine (123I-mIBG) has gained clinical momentum. Although the need for standardization of 123I-mIBG myocardial uptake has been recognized, the availability of practical clinical ...
K. Nakajima, D. Verschure, K. Okuda, H. Verberne   +3 more
semanticscholar   +1 more source

A Neck-Thyroid Phantom with Small Sizes of Thyroid Remnants for Postsurgical I-123 and I-131 SPECT/CT Imaging

Life, 2023
Post-surgical I-123 and I-131 SPECT/CT imaging can provide information on the presence and sizes of thyroid remnants and/or metastasis for an accurate re-staging of disease to apply an individualized radioiodine therapy.
Konstantinos Michael, Anastasia Hadjiconstanti, Antonis Lontos, George Demosthenous, Savvas Frangos, Yiannis Parpottas   +5 more
doaj   +1 more source

Experimental validation of L-shell x-ray fluorescence computed tomography imaging: phantom study

Journal of Medical Imaging, 2015
. Thanks to the current advances in nanoscience, molecular biochemistry, and x-ray detector technology, x-ray fluorescence computed tomography (XFCT) has been considered for molecular imaging of probes containing high atomic number elements, such as gold
M. Bazalova-Carter, Moiz Ahmad, L. Xing, R. Fahrig   +3 more
semanticscholar   +1 more source

Diffusion Capillary Phantom vs. Human Data: Outcomes for Reconstruction Methods Depend on Evaluation Medium

Frontiers in Neuroscience, 2016
Purpose: Diffusion MRI provides a non-invasive way of estimating structural connectivity in the brain. Many studies have used diffusion phantoms as benchmarks to assess the performance of different tractography reconstruction algorithms and assumed that ...
Sarah D. Lichenstein, Sarah D. Lichenstein, James H. Bishop, Timothy D. Verstynen, Timothy D. Verstynen, Fang-Cheng Yeh   +5 more
doaj   +1 more source

A Rotational Cylindrical fMRI Phantom for Image Quality Control. [PDF]

PLoS ONE, 2015
A novel phantom for image quality testing for functional magnetic resonance imaging (fMRI) scans is described.The cylindrical, rotatable, ~4.5L phantom, with eight wedge-shaped compartments, is used to simulate rest and activated states. The compartments
David A Tovar, Wang Zhan, Sunder S Rajan
doaj   +1 more source

Image quality and dose efficiency of high energy phase sensitive x-ray imaging: phantom studies.

Journal of X-Ray Science and Technology, 2014
The goal of this preliminary study was to perform an image quality comparison of high energy phase sensitive imaging with low energy conventional imaging at similar radiation doses.
M. Wong, Xizeng Wu, Hong Liu
semanticscholar   +1 more source

Consequences of the Patient's Mis-centering on the Radiation Dose and Image Quality in CT Imaging - Phantom and Clinical Study

, 2016
The position of the patient highly influences the functioning of the ATCM in CT imaging. The effect of different mis-centerings on the CTDIvol dose was determined during PMMA and water phantom simulations, which were also used for noise assessment.
L. Sukupova, D. Vedlich, F. Jiru
semanticscholar   +1 more source