Validation of pencil beam scanning proton therapy with multi‐leaf collimator calculated by a commercial Monte Carlo dose engine
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13817
Abstract: 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… read more here.
Keywords: collimator; multi leaf; beam; beam scanning ... See more keywords
Design of a Tri‐PET collimator for high‐resolution whole‐body mouse imaging
Sign Up to like & getrecommendations! Published in 2017 at "Medical Physics"
DOI: 10.1002/mp.12379
Abstract: Purpose: Tri‐PET refers to high‐resolution 511‐keV emission tomography using a multipinhole collimator in conjunction with lower resolution PET detectors operating in coincidence mode. Tri‐PET is unique in that three spatial locations are associated with each… read more here.
Keywords: high resolution; pet; collimator; tri pet ... See more keywords
Technical note: Improving VMAT delivery efficiency by optimizing the dynamic collimator trajectory.
Sign Up to like & getrecommendations! Published in 2019 at "Medical physics"
DOI: 10.1002/mp.13671
Abstract: PURPOSE To provide a method for optimizing the multi-leaf collimator angle trajectory in volumetric modulated arc therapy (VMAT) in order to make VMAT delivery and planning more efficient. METHODS Static uence maps are optimized at… read more here.
Keywords: dynamic collimator; vmat delivery; collimator; delivery ... See more keywords
18-1712R - Technical Note: Assessment of scatter originating from the X-ray tube collimator assembly of modern angiography systems.
Sign Up to like & getrecommendations! Published in 2019 at "Medical physics"
DOI: 10.1002/mp.13720
Abstract: PURPOSE While scatter from the patient is assumed to be the primary source of occupational radiation dose associated with fluoroscopically-guided interventional procedures, the potential contribution of scatter from the x-ray collimator assembly is unknown. The… read more here.
Keywords: collimator; assembly scatter; ray; collimator assembly ... See more keywords
Design of a focused collimator for proton therapy spot scanning using Monte Carlo methods.
Sign Up to like & getrecommendations! Published in 2020 at "Medical physics"
DOI: 10.1002/mp.14139
Abstract: PURPOSE When designing a collimation system for pencil beam spot scanning proton therapy, a decision must be made whether or not to rotate, or focus, the collimator to match beamlet deflection as a function of… read more here.
Keywords: collimator; proton therapy; spot scanning;
Challenges in modeling the Agility multileaf collimator in treatment planning systems and current needs for improvement
Sign Up to like & getrecommendations! Published in 2022 at "Medical Physics"
DOI: 10.1002/mp.16016
Abstract: Abstract Background The Agility multileaf collimator (MLC) mounted in Elekta linear accelerators features some unique design characteristics, such as large leaf thickness, eccentric curvature at the leaf tip, and defocused leaf sides (‘tilting'). These characteristics… read more here.
Keywords: collimator; mlc; agility; geometry ... See more keywords
Efficacy of a dynamic collimator for overranging dose reduction in a second- and third-generation dual source CT scanner
Sign Up to like & getrecommendations! Published in 2017 at "European Radiology"
DOI: 10.1007/s00330-017-4745-8
Abstract: AbstractObjectivesThe purpose of this study was to assess the efficacy of the renewed dynamic collimator in a third-generation dual source CT (DSCT) scanner and to determine the improvements over the second-generation scanner.MethodsCollimator efficacy is defined… read more here.
Keywords: dynamic collimator; collimator; scanner; efficacy ... See more keywords
Diagnostic performance of IQ·SPECT with high-speed scanning: A preliminary quality control study in obese patients
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Nuclear Cardiology"
DOI: 10.1007/s12350-022-02928-3
Abstract: IQ·SPECT is a recently introduced collimator design for myocardial perfusion imaging (MPI). Little data exist on use of this collimator type in obese patients, particularly Class 2 or 3 [body mass index (BMI) > 35… read more here.
Keywords: quality; collimator; performance spect; obese patients ... See more keywords
Effect of the LEGe detector collimators on K-series peaks and Compton scattering in XRF analysis using gamma rays
Sign Up to like & getrecommendations! Published in 2018 at "Heliyon"
DOI: 10.1016/j.heliyon.2018.e00724
Abstract: The effect of a low-energy germanium detector collimator with different diameters on the measurement of the X-ray fluorescence of palladium (Pd) was studied experimentally. Changes in the Pd K-series and Compton scattering peaks were measured… read more here.
Keywords: collimator; detector collimator; effect; detector ... See more keywords
Performances of oscillating radial collimator for the Fermi chopper spectrometer 4SEASONS at J-PARC
Sign Up to like & getrecommendations! Published in 2018 at "Physica B: Condensed Matter"
DOI: 10.1016/j.physb.2018.05.028
Abstract: Abstract A novel operation pattern is introduced into the oscillating radial collimator for the Fermi chopper spectrometer 4SEASONS at the Materials and Life Science Experimental Facility in J-PARC. This pattern is shown to suppress shadows… read more here.
Keywords: collimator; collimator fermi; oscillating radial; radial collimator ... See more keywords
Point-spread-function enhancement via designing new configuration of collimator in nuclear medicine
Sign Up to like & getrecommendations! Published in 2022 at "Radiation Physics and Chemistry"
DOI: 10.1016/j.radphyschem.2021.109783
Abstract: Abstract Background The collimators in which the various geometrical configurations have been suggested to optimize the sensitivity and resolution have a key role in acquiring the qualified images in nuclear medicine towards a better recognition… read more here.
Keywords: medicine; nuclear medicine; configuration; collimator ... See more keywords