Results 11 to 20 of about 272,932 (318)
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 +3 more
openaire +5 more sources
Monte Carlo Simulation for Polychromatic X-ray Fluorescence Computed Tomography with Sheet-Beam Geometry [PDF]
arXiv, 2017 X-ray fluorescence computed tomography based on sheet-beam can save a huge amount of time to obtain a whole set of projections using synchrotron. However, it is clearly unpractical for most biomedical research laboratories. In this paper, polychromatic X-
Chen, Mianyi +4 more
core +4 more sources
3-D Stochastic Numerical Breast Phantoms for Enabling Virtual Imaging Trials of Ultrasound Computed Tomography [PDF]
IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY
CONTROL, VOL. 69, NO. 1, JANUARY 2022, 2021 Ultrasound computed tomography (USCT) is an emerging imaging modality for breast imaging that can produce quantitative images that depict the acoustic properties of tissues. Computer-simulation studies, also known as virtual imaging trials, provide researchers with an economical and convenient route to systematically explore imaging system designs and ...
arxiv +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 using an optimal function which is obtained by means of the mean squared error as a criterion. Computer simulated images containing objects similar to those observed in the phantom are built to evaluate the ...
Adel, Mouloud +3 more
openaire +7 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 +2 more
openaire +1 more source
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. +2 more
openaire +2 more sources
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) +8 more
openaire +4 more sources
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 +4 more
doaj +1 more source
A standard system phantom for magnetic resonance imaging [PDF]
Magnetic Resonance in Medicine, 2021 PurposeA standard MRI system phantom has been designed and fabricated to assess scanner performance, stability, comparability and assess the accuracy of quantitative relaxation time imaging. The phantom is unique in having traceability to the International System of Units, a high level of precision, and monitoring by a national metrology institute ...
Karl F. Stupic +19 more
openaire +4 more sources
Image of a regular phantom compact object and its luminosity under spherical accretions [PDF]
Class.Quantum Grav. 38, 115008 (2021), 2020 We have studied the shadow and its luminosity for a static and regular phantom compact object under the static spherical accretion and the infalling spherical accretion, respectively. Comparing with the usual Schwarzschild black hole, the presence of phantom hair yields the larger black hole shadow and the darker image.
arxiv +1 more source