Results 81 to 90 of about 2,188,737 (317)
What is the reference frame of an accelerated observer?
The general construction of extended refrence frames for noninertial observers in flat space is studied. It is shown that, if the observer moves inertially before and after an arbitrary acceleration and rotation, the region where reference frames can ...
Karl-Peter Marzlin+7 more
core +2 more sources
Log file‐based quality assurance method for respiratory gating system
Abstract Background As medical linear accelerator technology advances, enabling higher dose rate deliveries, hypofractionation regimens has increased. This necessitates respiratory gating systems that synchronize radiation delivery with tumor position, requiring simple rigorous quality assurance (QA) to ensure treatment accuracy and patient safety ...
Wonjoong Cheon+7 more
wiley +1 more source
Awakening Pre-service Teachers to Children’s Social Exclusion in the Classroom
Children’s social exclusion in the classroom is a threat to the sustainability of education. Teachers should be sensitised to this issue, which raises important implications for teacher education.
Gedžūne Ginta
doaj +1 more source
Abstract Purpose Four‐dimensional cone‐beam CT (4D CBCT) incorporates oversampling of 3D data to reconstruct multi‐phase CBCT data sets representing distinct phases of the breathing cycle based on a diaphragmatic correlate of respiratory motion. Motion artifacts and blurring can be reduced relative to three‐dimensional cone‐beam (3D CBCT), allowing ...
Colton Baley+4 more
wiley +1 more source
The Relationship between Flux Coordinates and Equilibrium-based Frames of Reference in Fusion Theory
The properties of two local reference frames based on the magnetic field and the current density are investigated for magnetized plasmas in toroidal geometry with symmetric angle.
Greene, John M., Kruger, Scott E.
core +1 more source
Abstract Purpose This study aims to evaluate how different gantry angles, breathing rates (BPM), cine image speeds, and tracking algorithms affect beam on/off latency and the subsequent impact on target dose for a 0.35T MR‐Linac with a 6 MV FFF beam.
Mateb Al Khalifa+4 more
wiley +1 more source
Faculty Perceptions of Frame of Reference Training to Improve Workplace-Based Assessment. [PDF]
Kogan JR, Conforti LN, Holmboe ES.
europepmc +1 more source
Abstract Purpose This study aims to develop a CycleGAN based denoising model to enhance the quality of low‐dose PET (LDPET) images, making them as close as possible to standard‐dose PET (SDPET) images. Methods Using a Philips Vereos PET/CT system, whole‐body PET images of fluorine‐18 fluorodeoxyglucose (18F‐FDG) were acquired from 37 patients to ...
Yang Liu, ZhiWu Sun, HaoJia Liu
wiley +1 more source
Do People Explicitly Make a Frame Choice Based on the Reference Point?
Previous studies have shown that when choosing one of two logically equivalent frames (e.g., “half full” or “half empty”), people tend to choose based on a reference point.
Hidehito Honda+3 more
doaj +1 more source
Effects of online frame-of-reference training on assessment accuracy in the objective structured clinical examination for physical therapy students. [PDF]
Watari T+7 more
europepmc +1 more source