Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Lucian Mihailescu"'
Publikováno v:
IEEE Transactions on Nuclear Science. 69:2343-2359
Publikováno v:
IEEE Transactions on Nuclear Science, vol 66, iss 10
The ability to localize and map the distribution of gamma-ray emitting radionuclides in 3D has applications ranging from medical imaging to nuclear security. In the case of radiological source search and nuclear contamination remediation, the deploym
Publikováno v:
IEEE Transactions on Nuclear Science, vol 64, iss 11
Gamma-ray imaging facilitates the efficient detection, characterization, and localization of compact radioactive sources in cluttered environments. Fieldable detector systems employing active planar coded apertures have demonstrated broad energy sens
Publikováno v:
2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC).
Range uncertainty in proton therapy has a significant impact on the utilization and efficacy of the treatment modality. Several methods are under investigation to verify proton range by the detection of secondary emissions, with many studies focused
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 800:65-69
An approach to gamma-ray imaging has been developed that enables near real-time volumetric (3D) imaging of unknown environments thus improving the utility of gamma-ray imaging for source-search and radiation mapping applications. The approach, herein
Publikováno v:
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
The integration of gamma-ray imaging and visual scene data in 3D has been shown to improve radioactive source localization and mapping capabilities. Contextual sensors such as visual cameras and light detection and ranging units are used with Simulta
Publikováno v:
2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD).
Gamma-ray imaging allows for efficient detection, characterization, and localization of compact radioactive sources in cluttered environments. Fieldable detector systems employing active planar coded masks demonstrate broad energy sensitivity via bot
Publikováno v:
IEEE Transactions on Nuclear Science. 56:479-486
We present a new standoff imaging technique able to provide 3-dimensional (3D) images of gamma-ray sources distributed in the environment. Unlike standard 3D tomographic methods, this technique does not require the radioactive sources to be bounded w
Autor:
Lucian Mihailescu, Neal H. Clinthorne, Sam S. Huh, Daniel H. Chivers, Kai Vetter, Andrew Haefner
Publikováno v:
2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC).
We present a quantitative method for relating system matrices to the complete-data space in maximum likelihood expectation maximization (MLEM) using the Kullback-Leibler distance. We show that a more accurate system matrix has a smaller Kullback-Leib
Publikováno v:
Medical Physics. 43:3717-3717
Purpose: To evaluate and characterize a multi-slit collimated imaging system for use in prompt gamma range verification of proton therapy. Methods: Acrylic (PMMA) targets were irradiated with a 50 MeV proton beam. With the collimator placed 13 cm fro