From a Geometry of Vision to a Geometry of Light in Early-Modern Perspective
Must the architect or artist understand how the world is perceived on the convex surface of the eye to simulate the three-dimensional world on a two-dimensional plane?
doaj +2 more sources
AAPM medical physics practice guideline 13.a: HDR brachytherapy, part B
Abstract The goal of this report is to assist the clinical medical physicist in assuring that key quality standards and practice considerations are met to ensure safe, reliable, and reproducible high dose rate (HDR) brachytherapy (BT) treatment. This guideline has been developed to provide appropriate minimum standards for such services.
Susan L. Richardson+8 more
wiley +1 more source
Focusing of MeV ion beams by means of tapered glass capillary optics [PDF]
Takuya Nebiki+5 more
openalex +1 more source
Which Ratio of Areas Improves Vision Quality in Simultaneous Focus Optics?
David Rio, R. Legras
semanticscholar +1 more source
Automated rapidplan model validation using Eclipse scripting API
Abstract RapidPlan offers efficiency gains and quality improvements in treatment planning. Prior to its use in the clinic, it requires an extensive validation procedure in which established clinical plans and those generated by the model are compared. The manual iterative nature of this process is resource intensive, as numerous iterations are required
Bradley Beeksma+2 more
wiley +1 more source
Small-animal radionuclide imaging with focusing gamma-ray optics [PDF]
M. J. Pivovaroff+12 more
openalex +1 more source
Long‐term stability analysis of beam shape in a robotic radiosurgery system
Abstract Purpose This study aimed to investigate the long‐term stability of CyberKnife beam profile parameters and assess their compliance with existing quality assurance (QA) guidelines. We evaluated beam profiles in both standard and diagonal planes over 3.5 years post‐installation to detect potential issues and ensure consistent beam quality.
Ryoichi Hinoto+4 more
wiley +1 more source
GEOMETRIC-OPTICS FOR NONLINEAR CONCENTRATING WAVES IN FOCUSING AND NON-FOCUSING TWO GEOMETRIES [PDF]
Slim Ibrahim
openalex +1 more source
Abstract Purpose This study aims to develop a CycleGAN based denoising model to enhance the quality of low‐dose PET (LDPET) images, making them as close as possible to standard‐dose PET (SDPET) images. Methods Using a Philips Vereos PET/CT system, whole‐body PET images of fluorine‐18 fluorodeoxyglucose (18F‐FDG) were acquired from 37 patients to ...
Yang Liu, ZhiWu Sun, HaoJia Liu
wiley +1 more source
I. Optics of photography.—On a self-acting focus-equalizer, or the means of producing the differential movement of the two lenses of a photographic optical combination, which is capable, during the exposure, of bringing consecutively all the planes of a solid figure into focus, without altering the size of the various images superposed [PDF]
A. Claudet
openalex +1 more source