Results 11 to 20 of about 61,316 (277)

Development of lesion and organ negative cast modelling technique for quality assurance and optimization of nuclear medicine images [PDF]

Communications Medicine
Background Nuclear medicine imaging allows for a wide variety of data acquisition and image generation methods in the clinical setting. Imaging phantoms are routinely used to evaluate and optimize image quality and quantitative accuracy of features, but ...
Roberto Fedrigo, Robin J. N. Coope, Guillaume Chaussé, Ingrid Bloise, Claire Gowdy, François Bénard, Arman Rahmim, Carlos F. Uribe   +7 more
doaj   +2 more sources

Inter-phantom variability in digital mammography: implications for quality control [PDF]

European Radiology Experimental
Background Phantoms play a critical role in mammography quality control (QC) by providing standardized conditions for evaluating image quality (IQ) metrics.
Gisella Gennaro, Gilberto Contento, Andrea Ballaminut, Francesca Caumo   +3 more
doaj   +2 more sources

Computed Tomography Attenuation of Three-Dimensional (3D) Printing Materials—Depository to Aid in Constructing 3D-Printed Phantoms

Micromachines, 2023
Three-dimensionally printed phantoms are increasingly used in medical imaging and research due to their cost-effectiveness and customizability, offering valuable alternatives to commercial phantoms.
Yuktesh Kalidindi, Aravinda Krishna Ganapathy, Yash Nayak, Anusha Elumalai, David Z. Chen, Grace Bishop, Adrian Sanchez, Brian Albers, Anup S. Shetty, David H. Ballard   +9 more
doaj   +1 more source

Noise reduction on mammographic phantom images [PDF]

ELCVIA Electronic Letters on Computer Vision and Image Analysis, 2006
A noise reduction scheme on digitized mammographic phantom images is presented. This algorithm is based on a direct contrast modification method with an optimal function, obtained by using the mean squared error as a criterion. Computer simulated images containing objects similar to those observed in the phantom are built to evaluate the performance of
Adel, Mouloud, Zuwala, Daniel, Rasigni, M., Bourennane, Salah   +3 more
openaire   +6 more sources

Evaluation of MLC Thickness and Composite Effects on Collimation Parameters using EGSnrc and IAEA Phase Space Data [PDF]

Journal of Biomedical Physics and Engineering, 2020
Background: Recently, multileaf collimators (MLC) have become an important part of any LINAC collimation system because they reduce the treatment planning time and improve the conformity.
K Hadad, H Alipour
doaj   +1 more source

Materials for phantoms for terahertz pulsed imaging [PDF]

Physics in Medicine and Biology, 2004
Phantoms are commonly used in medical imaging for quality assurance, calibration, research and teaching. They may include test patterns or simulations of organs, but in either case a tissue substitute medium is an important component of the phantom. The aim of this work was to identify materials suitable for use as tissue substitutes for the relatively
Gillian C. Walker, David Brettle, Elizabeth Berry, Stephen W. Smye   +3 more
openaire   +3 more sources

Developing a Phantom for the Positronium Imaging Evaluation

Acta Physica Polonica B Proceedings Supplement, 2022
In this contribution, a concept for a new phantom for positronium imaging with PET scanners is described. The proposed phantom is based on the NEMA IEC phantom in which six high-activity spheres are filled with solutions characterized by a different mean ortho-positronium lifetime.
Łapkiewicz, G., Niedźwiecki, Sz., Moskal, P.   +2 more
openaire   +2 more sources

Classification of phantoms for medical imaging

Procedia CIRP, 2023
Phantoms are physical models that mimic biological tissue and its properties in medical imaging. They play an important role in medical quality assurance, research, education, and training, since they can offer an adequate test environment. As the use of medical imaging modalities is a growing field in medicine phantoms are likewise evolving very ...
Wegner, Marie, Gargioni, Elisabetta, Krause, Dieter   +2 more
openaire   +1 more source

Agarose Gel Characterization for the Fabrication of Brain Tissue Phantoms for Infrared Multispectral Vision Systems

Gels, 2023
Synthetic phantoms that recreate the characteristics of biological tissues are valuable tools for systematically studying and comprehending physiologies, pathologies, and biological processes related to tissues. The reproduction of mechanical and optical
Efraín Albor-Ramírez, Miguel Reyes-Alberto, Luis M. Vidal-Flores, Enoch Gutierrez-Herrera, Miguel A. Padilla-Castañeda   +4 more
doaj   +1 more source

Tissue mimicking phantoms for fluorescence imaging [PDF]

Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine, 2020
The article describes the development of the optical phantom mimicking flavin adenine dinucleotide (FAD) and skin collagen fluorescence. The results of experimental studies using fluorescence imaging and fluorescence spectroscopy methods are demonstrated. The method of optical phantom production for quick calibration of fluorescence imaging devices for
Shupletsov, V. (Valery), Kandurova, K. (Ksenia), Stavtsev, D. (Dmitry), Stolbov, A. (Aleksandr), Potapova, E. (Elena), Dremin, V. (Viktor), Vinokurov, A. (Andrey), Podmaster’ev, K. (Konstantin), Dunaev, A. (Andrey)   +8 more
openaire   +4 more sources