Beam focal spot position determination for an Elekta linac with the Agility® head; practical guide with a ready‐to‐go procedure
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.12344
Abstract: Abstract A novel phantomless, EPID‐based method of measuring the beam focal spot offset of a linear accelerator was proposed and validated for Varian machines. In this method, one set of jaws and the MLC were… read more here.
Keywords: linac agility; focal spot; elekta linac; beam focal ... See more keywords
Modularized Data-Driven Reconstruction Framework for Non-ideal Focal Spot Effect Elimination in Computed Tomography.
Sign Up to like & getrecommendations! Published in 2021 at "Medical physics"
DOI: 10.1002/mp.14785
Abstract: PURPOSE High-performance computed tomography (CT) plays a vital role in clinical decision making. However, the performance of CT imaging is adversely affected by the non-ideal focal spot size of the X-ray source or degraded by… read more here.
Keywords: modularized data; framework; focal spot; data driven ... See more keywords
Analysis on the focal spot characteristics of random Gauss phase plate
Sign Up to like & getrecommendations! Published in 2017 at "Optik"
DOI: 10.1016/j.ijleo.2016.10.084
Abstract: Abstract Gaussian phase plate (GPP) is a special kind of continuous phase plate, which surface figure can be described as a Gaussian random process. In this paper we propose an analysis model to discuss the… read more here.
Keywords: analysis; focal spot; phase plate;
Very compact focal spot in the near-field of the fractional axicon
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2016.12.034
Abstract: Abstract Theoretical and numerical analysis of the plane wave diffraction by a fractional axicon with less than one degree is performed in the near-field considering the evanescent waves. The first type of Rayleigh-Sommerfeld integral transformation… read more here.
Keywords: compact focal; focal spot; near field; fractional axicon ... See more keywords
Filamentation of spatiotemporal smoothed focal spot in plasma by Beam Smoothing scheme
Sign Up to like & getrecommendations! Published in 2019 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.12.039
Abstract: Abstract An intense laser would suffer nonlinear effects during its propagation in plasma, which greatly affects the illumination uniformities of laser beams in a hohlraum for ignition. Based on the theory of the relativistic and… read more here.
Keywords: beam smoothing; focal spot; filamentation; beam ... See more keywords
Focal spot optimization through scattering media in multiphoton lithography
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2021.106607
Abstract: Abstract Shaping the optical wavefront utilizing spatial light modulators (SLMs) is a valuable methodology for modification of a focal spot. It has numerous applications in microscopy, particularly in scattering media. Optical lithography techniques, i.e. multiphoton… read more here.
Keywords: optimization; scattering media; focal spot; multiphoton lithography ... See more keywords
The effect of a variable focal spot size on the contrast channels retrieved in edge-illumination X-ray phase contrast imaging
Sign Up to like & getrecommendations! Published in 2022 at "Scientific Reports"
DOI: 10.1038/s41598-022-07376-0
Abstract: Multi-modal X-ray imaging allows the extraction of phase and dark-field (or “Ultra-small Angle Scatter”) images alongside conventional attenuation ones. Recently, scan-based systems using conventional sources that can simultaneously output the above three images on relatively… read more here.
Keywords: edge illumination; phase; focal spot; ray ... See more keywords
Bremsstrahlung emission profile from intense laser-solid interactions as a function of laser focal spot size
Sign Up to like & getrecommendations! Published in 2019 at "Plasma Physics and Controlled Fusion"
DOI: 10.1088/1361-6587/aaf596
Abstract: The bremsstrahlung x-ray emission profile from high intensity laser-solid interactions provides valuable insight to the internal fast electron transport. Using penumbral imaging, we characterise the spatial profile of this bremsstrahlung source as a function of… read more here.
Keywords: bremsstrahlung; emission profile; focal spot; laser ... See more keywords
Colorless movement of focal spot with arbitrary velocity based on mirrors with special shape
Sign Up to like & getrecommendations! Published in 2021 at "Physica Scripta"
DOI: 10.1088/1402-4896/abf3f8
Abstract: Focal spot with moving speed is a new concept proposed in recent years, which has many applications in physics of intense field. The current method is to control the moving speed of focal spot by… read more here.
Keywords: colorless movement; moving speed; spot; focal spot ... See more keywords
Single-pulse characterization of the focal spot size of X-ray free-electron lasers using coherent diffraction imaging
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Synchrotron Radiation"
DOI: 10.1107/s1600577523000887
Abstract: A new spot characterization method is proposed, based on coherent diffraction imaging that can accurately determine the focal spot size of a single X-ray free-electron laser pulse. This method was successfully applied to characterize the… read more here.
Keywords: spot; free electron; spot size; focal spot ... See more keywords
Ultrasound Neurostimulation in Mice: Impact of Ultrasound Settings and Beam Properties
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2022.3144335
Abstract: Ultrasound neurostimulation (USNS) is being investigated as a treatment approach for neuropsychiatric and neurodegenerative disorders. Indeed, unlike the existing methods that use electric or magnetic stimulation, it offers the possibility to modulate brain activity in… read more here.
Keywords: neurostimulation; ultrasound neurostimulation; focal spot; frequency ... See more keywords