A novel and independent method for time‐resolved gantry angle quality assurance for VMAT
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.12129
Abstract: Abstract Volumetric‐modulated arc therapy (VMAT) treatment delivery requires three key dynamic components; gantry rotation, dose rate modulation, and multi‐leaf collimator motion, which are all simultaneously varied during the delivery. Misalignment of the gantry angle can… read more here.
Keywords: vmat; gantry angle; gantry; time resolved ... See more keywords
Evaluation of cine imaging during multileaf collimator and gantry motion for real‐time magnetic resonance guided radiation therapy
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13085
Abstract: Abstract Purpose Real‐time magnetic resonance guided radiation therapy (MRgRT) uses 2D cine imaging for target tracking. This work evaluates the percent image uniformity (PIU) and spatial integrity of cine images in the presence of multileaf… read more here.
Keywords: cine images; gantry; real time; motion ... See more keywords
A 3D star shot to determine the gantry, collimator, and couch axes positions
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13623
Abstract: Abstract A linear accelerator has three independent axes that are nominally intersecting at the isocenter. Modern treatment techniques require the coincidence of these axes to lie within a 1‐mm diameter sphere. A solution to verify… read more here.
Keywords: gantry collimator; collimator couch; star shot; determine ... See more keywords
Variation in Elekta iView electronic portal imager pixel scale factor with gantry angle, and impact on multi‐leaf collimator quality assurance
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13661
Abstract: Abstract For Elekta Agility linear accelerators, the iViewGT electronic portal imaging device (EPID) is positioned at a nominal X‐Ray source‐to‐panel distance of 1600 mm. For display, image registration, and data processing purposes, the image pixels… read more here.
Keywords: electronic portal; leaf collimator; multi leaf; gantry ... See more keywords
Dose rate versus gantry speed performance evaluation for slow gantry speeds using DICOM RT plans
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13786
Abstract: Abstract Purpose Varian provides a DICOM RT Plan file that users can deliver to the electronic portal imaging device (EPID) panel to confirm the linear accelerator delivers consistent dose output across several regions of interest… read more here.
Keywords: gantry speeds; drgs dicom; per degree; gantry ... See more keywords
Part 1: Optimization and evaluation of dynamic trajectory radiotherapy
Sign Up to like & getrecommendations! Published in 2018 at "Medical Physics"
DOI: 10.1002/mp.13086
Abstract: PURPOSE Although volumetric modulated arc therapy (VMAT) is a well-accepted treatment technique in radiotherapy using a coplanar delivery approach, VMAT might be further improved by including dynamic table and collimator rotations leading to dynamic trajectory… read more here.
Keywords: gantry; treatment; vmat plans; optimization ... See more keywords
Commissioning of a fluoroscopic‐based real‐time markerless tumor tracking system in a superconducting rotating gantry for carbon‐ion pencil beam scanning treatment
Sign Up to like & getrecommendations! Published in 2019 at "Medical Physics"
DOI: 10.1002/mp.13403
Abstract: PURPOSE To perform the final quality assurance of our fluoroscopic-based markerless tumor tracking for gated carbon-ion pencil beam scanning (C-PBS) radiotherapy using a rotating gantry system, we evaluated the geometrical accuracy and tumor tracking accuracy… read more here.
Keywords: gantry; latency; system; accuracy ... See more keywords
Real-time B0 compensation during gantry rotation in a 0.35 T MRI-Linac.
Sign Up to like & getrecommendations! Published in 2022 at "Medical physics"
DOI: 10.1002/mp.15892
Abstract: BACKGROUND Rotation of the ferromagnetic gantry of a low magnetic field MRI-Linac was previously demonstrated to cause large center frequency offsets of ±400 Hz. The B0 off-resonances cause image artifacts and imaging isocenter shifts that… read more here.
Keywords: time; gantry; compensation; rotation ... See more keywords
Radiation dose of chaperones during common pediatric computed tomography examinations
Sign Up to like & getrecommendations! Published in 2020 at "Pediatric Radiology"
DOI: 10.1007/s00247-020-04681-6
Abstract: Background One main challenge in pediatric imaging is to reduce motion artifacts by calming young patients. To that end, the Radiological Society of North America (RSNA) as early as 1997 stated the necessity of adults… read more here.
Keywords: radiation dose; dose chaperones; gantry; protocol ... See more keywords
A novel constrained H2 optimization algorithm for mechatronics design in flexure-linked biaxial gantry.
Sign Up to like & getrecommendations! Published in 2017 at "ISA transactions"
DOI: 10.1016/j.isatra.2017.08.001
Abstract: The biaxial gantry is widely used in many industrial processes that require high precision Cartesian motion. The conventional rigid-link version suffers from breaking down of joints if any de-synchronization between the two carriages occurs. To… read more here.
Keywords: gantry; flexure linked; optimization; biaxial gantry ... See more keywords
Robust control for active damping of elastic gantry crane vibrations
Sign Up to like & getrecommendations! Published in 2019 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2018.11.005
Abstract: Abstract One of the most significant structural dynamics problems of large gantry cranes are elastic vibrations in trolley travel direction. They put additional mechanical stresses on a crane construction and reduce crane operation performance. As… read more here.
Keywords: gantry crane; crane; active damping; robust control ... See more keywords