Results 151 to 160 of about 4,848,832 (374)
Monte Carlo modeling of radiation dose from radiation therapy with superficial x‐rays
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Reham Barghash +3 more
wiley +1 more source
Asymmetry in repeated isotropic rotations
Physical Review Research, 2019 Random operators constitute fundamental building blocks of models of complex systems yet are far from fully understood. Here, we explain an asymmetry emerging upon repeating identical isotropic (uniformly random) operations.
Malte Schröder, Marc Timme
doaj +1 more source
A lifting method for analyzing distributed synchronization on the unit sphere [PDF]
at - Automatisierungstechnik, 2018 J. Thunberg +3 more
semanticscholar +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study evaluates the dosimetric and geometric precision of a virtual cone technique using CBCT‐based polymer gel dosimetry, enabling radiation delivery, and imaging readout within an identical spatial coordinate system. Methods We created a C# script for a virtual cone technique that generates a treatment plan with 10 gantry arcs ...
Tenzin Kunkyab +6 more
wiley +1 more source
Loxodromic unit vector field on punctured spheres [PDF]
arXiv, 2019 In these short notes we characterize the loxodromic unit vector fields on antipodally punctured Euclidean spheres as the only ones achieving a lower bound for the volume functional depending on the Poincar\'e indexes around their singularities.
arxiv
On the Carleson measure characterization of BMO functions on the unit sphere [PDF]
, 1995 Miroljub Jevtić
openalex +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Background Dual‐energy cone‐beam CT (DE‐CBCT) has become subject of recent interest due to the ability to produce virtual monoenergetic images (VMIs) with improved soft‐tissue contrast and reduced nonuniformity artifacts. However, efficient production and optimization of VMIs remains an under‐explored part of DE‐CBCT's application.
Andrew Keeler +4 more
wiley +1 more source
Design and validation of a novel dosimetry phantom for motion management audits
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Background We present a novel phantom design for conducting end‐to‐end dosimetry audits for respiratory motion management of two anatomical treatment sites. The design enables radiochromic film measurements of the dose administered to the target throughout the respiratory cycle (motion‐included) and the dose delivered to the time‐averaged ...
Alex Burton +5 more
wiley +1 more source
Minimal hypersurfaces of unit sphere [PDF]
Tohoku Mathematical Journal, 1997 Sun, Huafei, Ogiue, Koichi
openaire +2 more sources
On complex-tangential curves on the unit sphere on $\mathbf {C}^2$ and homogeneous polynomials [PDF]
, 2000 Hong Oh Kim
openalex +1 more source