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
Dual‐focal‐spot single‐detector CT: A simulation study to assess cone‐beam artifacts and noise
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.70220
Abstract: Abstract Background Ultra‐wide coverage CT (> 128 detector rows) makes it possible to image a heart or brain in a single rotation but are associated with large cone angles, which can severely degrade the image… read more here.
Keywords: image; focal spot; detector; geometry ... 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
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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
Focal spot polarization distribution under polarization smoothing
Sign Up to like & getrecommendations! Published in 2025 at "High Power Laser Science and Engineering"
DOI: 10.1017/hpl.2025.10
Abstract: Abstract Polarization smoothing can effectively improve the uniformity of focal spots. In this study, we theoretically and experimentally investigated the polarization synthesis of the focal spot under a birefringent wedge (BW) and speckle under the… read more here.
Keywords: polarization; focal spot; polarization smoothing; polarization distribution ... 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