Results 31 to 40 of about 41,405 (209)

Development and application of stable phantoms for the evaluation of photoacoustic imaging instruments. [PDF]

PLoS ONE, 2013
Photoacoustic imaging combines the high contrast of optical imaging with the spatial resolution and penetration depth of ultrasound. This technique holds tremendous potential for imaging in small animals and importantly, is clinically translatable.
Sarah E Bohndiek, Sandhya Bodapati, Dominique Van De Sompel, Sri-Rajasekhar Kothapalli, Sanjiv S Gambhir   +4 more
doaj   +1 more source

Comparisons of Hounsfield Unit Linearity between Images Reconstructed using an Adaptive Iterative Dose Reduction (AIDR) and a Filter Back-Projection (FBP) Techniques [PDF]

Journal of Biomedical Physics and Engineering, 2020
Background: The HU linearity is an essential parameter in a quantitative imaging and the treatment planning systems of radiotherapy. Objective: This study aims to evaluate the linearity of Hounsfield unit (HU) in applying the adaptive iterative dose ...
I Suyudi, C Anam, H Sutanto, P Triadyaksa, T Fujibuchi   +4 more
doaj   +1 more source

Realistic analytical phantoms for parallel magnetic resonance imaging [PDF]

, 2012
The quantitative validation of reconstruction algorithms requires reliable data. Rasterized simulations are popular but they are tainted by an aliasing component that impacts the assessment of the performance of reconstruction.
Unser, M, Pruessmann, K, Lejeune, L, Lejeune, L., Unser, M., Guerquin-Kern, M., M. Guerquin-Kern, Guerquin-Kern, M, Pruessmann, K. P., L. Lejeune, K. P. Pruessmann, M. Unser   +11 more
core   +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
Walker, G.C., Berry, E., Smye, S.E., Brettle, D.S.   +3 more
openaire   +3 more sources

Establishment of Diagnostic Reference Levels for Computed Tomography Scanning in Hamadan [PDF]

Journal of Biomedical Physics and Engineering, 2020
Background: New advancements have increased the capabilities of computed tomography as a sectional medical imaging modality. An important note is assessing absorbed dose to patients and minimizing it when performing computed tomography examinations.
S Jafari, K Ghazikhanlu Sani, M Karimi, H Khosravi, R Goodarzi, M Pourkaveh   +5 more
doaj   +1 more source

Quantitative magnetic resonance imaging phantoms: A review and the need for a system phantom [PDF]

Magnetic Resonance in Medicine, 2017
The MRI community is using quantitative mapping techniques to complement qualitative imaging. For quantitative imaging to reach its full potential, it is necessary to analyze measurements across systems and longitudinally. Clinical use of quantitative imaging can be facilitated through adoption and use of a standard system phantom, a calibration ...
Kathryn E. Keenan, Maureen Ainslie, Alex J. Barker, Michael A. Boss, Kim M. Cecil, Cecil Charles, Thomas L. Chenevert, Larry Clarke, Jeffrey L. Evelhoch, Paul Finn, Daniel Gembris, Jeffrey L. Gunter, Derek L.G. Hill, Clifford R. Jack, Edward F. Jackson, Guoying Liu, Stephen E. Russek, Samir D. Sharma, Michael Steckner, Karl F. Stupic, Joshua D. Trzasko, Chun Yuan, Jie Zheng   +22 more
openaire   +3 more sources

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, Maureen Ainslie, Michael A. Boss, Cecil Charles, Andrew M. Dienstfrey, Jeffrey L. Evelhoch, Paul Finn, Zydrunas Gimbutas, Jeffrey L. Gunter, Derek L. G. Hill, Clifford R. Jack, Edward F. Jackson, Todor Karaulanov, Kathryn E. Keenan, Guoying Liu, Michele N. Martin, Pottumarthi V. Prasad, Nikki S. Rentz, Chun Yuan, Stephen E. Russek   +19 more
openaire   +3 more sources

Calibration of Spectral Imaging Devices With Oxygenation-Controlled Phantoms: Introducing a Simple Gel-Based Hemoglobin Model

Frontiers in Physics, 2019
An optical phantom model with stable oxygen saturation (StO2) and optical properties (OPs) is the key for quick and accurate calibration of spectral imaging devices.
V. N. Du Le, Myla Manser, Sunny Gurm, Ben Wagner, Joseph E. Hayward, Qiyin Fang, Qiyin Fang   +6 more
doaj   +1 more source

In Silico Phase-Contrast X-Ray Imaging of Anthropomorphic Voxel-Based Phantoms

, 2021
Propagation-based phase-contrast X-ray imaging is an emerging technique that can improve dose efficiency in clinical imaging. In silico tools are key to understanding the fundamental imaging mechanisms and develop new applications.
Shaker, Kian, Shaker, Kian,, Hertz, Hans,, Häggmark, Ilian, Häggmark, Ilian,, Hertz, Hans   +5 more
core   +1 more source

Machine learning for automatic construction of pediatric abdominal phantoms for radiation dose reconstruction [PDF]

, 2020
The advent of Machine Learning (ML) is proving extremely beneficial in many healthcare applications. In pediatric oncology, retrospective studies that investigate the relationship between treatment and late adverse effects still rely on simple heuristics.
Wang, Ziyuan (author), Wang, Ziyuan, Bosman, P.A.N. (author), Peter A. N. Bosman, Bosman, Peter, Bosman, P.A.N. (Peter), Marco Virgolin, Alderliesten, T. (Tanja), Virgolin, M. (author), Alderliesten, T. (author), Wang, Z. (Ziyuan), Ziyuan Wang, Virgolin, M. (Marco), Alderliesten, Tanja, Tanja Alderliesten, Virgolin, Marco   +15 more
core   +2 more sources