Cherenkov Luminescence Imaging (CLI) is a new method to image radioactive therapeutic and diagnostic agents, primarily in preclinical studies. This study used Geant4 and Python to generate the predicted Cherenkov light production as a function of time for a set of isotopic chains of interest for targeted alpha therapy: Ra, Pb, and Tb. All are shown to produce substantial Cherenkov light, though time delays between initial decays and the production of Cherenkov light requires caution in interpreting CLI.
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http://dx.doi.org/10.1016/j.apradiso.2016.10.009 | DOI Listing |
Proc SPIE Int Soc Opt Eng
February 2024
Radiation Monitoring Devices, Inc., 44 Hunt St., Watertown, MA, USA 02472- 4624.
Development of new scintillator materials is a continuous effort, which recently has been focused on materials with higher stopping power. Higher stopping power can be achieved if the compositions include elements such as Tl (Z=81) or Lu (Z=71), as the compounds gain higher densities and effective atomic numbers. In context of medical imaging this translates into high detection efficiency (count rates), therefore, better image quality (statistics, thinner films) or lower irradiation doses to patients in addition to lowering of cost.
View Article and Find Full Text PDFBiomed Phys Eng Express
December 2024
School of Health Sciences, Department of Radiological Technology, Nagoya University, Japan.
Cherenkov radiation is emitted during x-ray irradiation in a linear accelerator (LINAC). Cherenkov light contains many short wavelength components, including ultraviolet (UV) light, which is well-known for its bactericidal effects. A similar phenomenon is probable for human cancer cells.
View Article and Find Full Text PDFVortex free-electron radiation has attracted considerable interest because of its promising potential for applications in communication, high-density radiation sources, and particle detection. Here, we reveal angular momentum modulation of vortex Cherenkov radiation using subwavelength silicon waveguides. The topological charge of vortex radiation field can be controlled by the position parameters of two electron beams based on the rotational symmetry.
View Article and Find Full Text PDFBiomed Phys Eng Express
November 2024
Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin-Madison, WI, United States of America.
. To develop a robust method for non-contact surface dosimetry during Total Body Irradiation (TBI) that uses an optimally paired choice of scintillator material with camera photocathode and can work insensitively to the normal ambient room lighting conditions (∼500 Lux)..
View Article and Find Full Text PDFJ Appl Clin Med Phys
December 2024
CyberKnife Center, Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China.
Purpose: The goal of this study is to assess the utility of Cherenkov imaging (CI) and scintillation imaging (SI) as high-resolution techniques to measure CyberKnife® beam shape quantitatively at the irradiation surface in quality assurance (QA).
Methods: The EMCCD camera captured scintillation and Cherenkov photons arising from 6 MV x-ray dose deposition produced by the CyberKnife® VSI System. Two imaging methods were done at source to surface distance of 800 cm with the same field size, ranging from 10 to 60 mm using fixed cones and iris collimators.
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