Results 31 to 40 of about 2,508,631 (310)

Treatment planning with a 2.5 MV photon beam for radiation therapy

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose The shallow depth of maximum dose and higher dose fall‐off gradient of a 2.5 MV beam along the central axis that is available for imaging on linear accelerators is investigated for treatment of shallow tumors and sparing the organs at risk (OARs) beyond it.
Navid Khaledi, Chris Hayes, Louise Belshaw, Mark Grattan, Rao Khan, James L. Gräfe   +5 more
wiley   +1 more source

Impact of flexible noise control (FNC) image processing parameters on portable chest radiography

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract There is a lack of understanding in the performance of flexible noise control (FNC) processing, which is used in digital radiography on a scanner vendor and has four parameters each involving multiple options. The aim of this study was to investigate the impact of FNC on portable chest imaging. An anthropomorphic chest phantom was imaged using
Krystal M. Kirby, Liqiang Ren, Timothy R. Daly, Yasmeen K. Tandon, Brian J. Bartholmai, Beth A. Schueler, Zaiyang Long   +6 more
wiley   +1 more source

Isometric Shape Representation by Integrating Shape Function Maps and Deep Learning

IEEE Access, 2019
With the wide application of isometric 3D models, the representation and recognition of them receive increasing attention. Most existing methods for shape representation and analysis either focus on using the constrained hand-craft models or purely ...
Zijian Wang, Zhenzhong Kuang, Zhiqiang Guo, Suguo Zhu, Min Tan   +4 more
doaj   +1 more source

Volume staging for arteriovenous malformation SRS treatment using VMAT

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Volume staging involves dividing the target volume into smaller parts and treating each part separately. In this study, the feasibility of volume‐staged stereotactic radiosurgery (VS‐SRS) on a linear accelerator using volumetric modulated arc therapy (VMAT) and a frameless patient positioning system is investigated.
Claudia Mendez, Ermias Gete
wiley   +1 more source

Atrial Fibrosis Hampers Non-invasive Localization of Atrial Ectopic Foci From Multi-Electrode Signals: A 3D Simulation Study

Frontiers in Physiology, 2018
Introduction: Focal atrial tachycardia is commonly treated by radio frequency ablation with an acceptable long-term success. Although the location of ectopic foci tends to appear in specific hot-spots, they can be located virtually in any atrial region ...
Eduardo Jorge Godoy, Miguel Lozano, Ignacio García-Fernández, Ana Ferrer-Albero, Rob MacLeod, Javier Saiz, Rafael Sebastian   +6 more
doaj   +1 more source

Validation of pencil beam scanning proton therapy with multi‐leaf collimator calculated by a commercial Monte Carlo dose engine

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract This study aimed to evaluate the clinical beam commissioning results and lateral penumbra characteristics of our new pencil beam scanning (PBS) proton therapy using a multi‐leaf collimator (MLC) calculated by use of a commercial Monte Carlo dose engine.
Yuki Tominaga, Yusuke Sakurai, Junya Miyata, Shuichi Harada, Takashi Akagi, Masataka Oita   +5 more
wiley   +1 more source

Computer simulation of syringomyelia in dogs [PDF]

, 2018
Syringomyelia is a pathological condition in which fluid-filled cavities (syringes) form and expand in the spinal cord. Syringomyelia is often linked with obstruction of the craniocervical junction and a Chiari malformation, which is similar in both ...
AC Freeman, AR Brodbelt, B Williams, B Williams, B Williams, BA Martin, BA Martin, BA Martin, C Rusbridge, C Rusbridge, C Rusbridge, C Rusbridge, C Rusbridge, CA Schneider, CD Bertram, CD Bertram, CD Bertram, CD Bertram, CJ Driver, Clare Rusbridge, DJ Marino, DN Levine, EC Clarke, F Loth, Holger A. Volk, HS Chang, IM Vavasour, J Strahle, JD Heiss, JE Parker, Jelena Jovanovik, K Berkouk, K Chandler, KH Stoverud, LE Bilston, LE Bilston, M Heil, M Kim, M Perdiki, MA Stoodley, MJ Hezzell, N Alperin, NJ Alperin, NJ Fischbein, NS Elliott, NS Elliott, NSJ Elliott, NSJ Elliott, PW Carpenter, R Fric, Robert Lloyd, S Cerda-Gonzalez, S Cirovic, S Cirovic, S Heidari Pahlavian, S Loderstedt, S Yildiz, SJ Hemley, SP Knowler, SP Knowler, Srdjan Cirovic, TH Milhorat, TH Milhorat, W Kalata, WD Whetstone   +64 more
core   +3 more sources

Efficient Algorithms for Universal Quantum Simulation [PDF]

5th International Conference on Reversible Computation (RC 2013), Victoria, BC, Canada, July 4-5, 2013. Proceedings. Lecture Notes in Computer Science Volume 7948, 2013, pp 1-10, 2013
A universal quantum simulator would enable efficient simulation of quantum dynamics by implementing quantum-simulation algorithms on a quantum computer. Specifically the quantum simulator would efficiently generate qubit-string states that closely approximate physical states obtained from a broad class of dynamical evolutions.
arxiv   +1 more source

Effect of different noise reduction techniques and template matching parameters on markerless tumor tracking using dual‐energy imaging

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To evaluate the impact of various noise reduction algorithms and template matching parameters on the accuracy of markerless tumor tracking (MTT) using dual‐energy (DE) imaging. Methods A Varian TrueBeam linear accelerator was used to acquire a series of alternating 60 and 120 kVp images (over a 180° arc) using fast kV switching, on ...
Mandeep Kaur, Peter Wagstaff, Hassan Mostafavi, Mathias Lehmann, Daniel Morf, Liangjia Zhu, Hyejoo Kang, Michal Walczak, Matthew M. Harkenrider, John C. Roeske   +9 more
wiley   +1 more source

Instability of Reissner–Nordström black hole in Einstein-Maxwell-scalar theory

European Physical Journal C: Particles and Fields, 2019
The scalarization of Reissner–Nordström black holes was recently proposed in the Einstein-Maxwell-scalar theory. Here, we show that the appearance of the scalarized Reissner–Nordström black hole is closely related to the Gregory-Laflamme instability of ...
Yun Soo Myung, De-Cheng Zou
doaj   +1 more source