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   Articles with "gantry" as a keyword



A novel and independent method for time‐resolved gantry angle quality assurance for VMAT

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recommendations! 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
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Evaluation of cine imaging during multileaf collimator and gantry motion for real‐time magnetic resonance guided radiation therapy

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recommendations! 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

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recommendations! 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

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recommendations! 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

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recommendations! 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

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recommendations! 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

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recommendations! 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.

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recommendations! 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

Feasibility study of multiple-energy Bragg peak proton FLASH on a superconducting gantry with large momentum acceptance.

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recommendations! Published in 2024 at "Medical physics"

DOI: 10.1002/mp.16932

Abstract: BACKGROUND While the Bragg peak proton beam (BP) is capable of superior target conformity and organs-at-risk sparing than the transmission proton beam (TB), its efficacy in FLASH-RT is hindered by both a slow energy switching… read more here.

Keywords: multiple energy; flash; proton; energy ... See more keywords
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Radiation dose of chaperones during common pediatric computed tomography examinations

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recommendations! 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.

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recommendations! 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