Download or read book The Development of a Compton Camera for the Imaging of Gamma Rays in the Energy Range 0 662 MeV to 6 130 MeV written by Martin Jones and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of a Compton Camera for the Imaging of Gamma Rays in the Energy Range 0 662 MeV to 6 130 MeV written by Martin Paul Jones and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compton Scatter Camera for Spectral Imaging of 0 5 to 3 0 MeV Gamma Rays written by Jeffrey Basil Martin and published by . This book was released on 1994 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Design of a Near Field High Energy Gamma Camera for Use with Neutron Stimulated Emission Computed Tomography written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new gamma imaging method, Neutron Stimulated Emission Computed Tomography (NSECT), is being developed to non-invasively and non-destructively measure and image elemental concentrations in vivo. In NSECT a beam of fast neutrons (3 - 5 MeV) bombards a target, inelastically scattering with target nuclei and exciting them. Decay from this excited state produces characteristic gamma emissions. Collecting the resulting gamma energy spectrum allows identification of elements present in the target. As these gamma rays range in energy from 0.3 - 1.5 MeV, outside the useable energy range for existing gamma cameras (0.1 - 511 MeV), a new gamma imaging method must be developed. The purpose of this dissertation is to design and develop a near-field (less then 0.5 m) high-energy (0.3 - 1.5 MeV) gamma camera to facilitate planar NSECT imaging. Modifying a design implemented in space-based imaging (focus of infinity), a prototype camera was built. Experimental testing showed that the far-field space-based assumptions were inapplicable in the near-field. A new mathematical model was developed to describe the modulation behavior in the near-field. Additionally, a Monte Carlo simulation of the camera and imaging environment was developed. These two tools were used to facilitate optimization of the camera parameters. Simulated data was then used to reconstruct images for both small animal and human fields of view. Limitations of the camera design were identified and quantified. Image analysis demonstrated that the camera has the potential to identify regions of interest in a human field of view.
Download or read book The Gamma ray Pinhole Camera with Image Amplifier written by Robert K. Mortimer and published by . This book was released on 1954 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compton Camera for Spectroscopic Imaging from 100 KeV to 1 MeV written by and published by . This book was released on 1998 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of spectroscopic imaging issues, applications, and technology is presented. Compton cameras based on solid state semiconductor detectors stands out as the best system for the nondestructive assay of special nuclear materials. A camera for this application has been designed based on an efficient specific purpose Monte Carlo code developed for this project. Preliminary experiments have been performed which demonstrate the validity of the Compton camera concept and the accuracy of the code. Based on these results, a portable prototype system is in development. Proposed future work is addressed.
Download or read book Development and Design of a Near Field High Energy Gamma Camera for Use with Neutron Stimulated Emission Computed Tomography written by Amy Congdon Sharma and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new gamma imaging method, Neutron Stimulated Emission Computed Tomography (NSECT), is being developed to non-invasively and non-destructively measure and image elemental concentrations in vivo. In NSECT a beam of fast neutrons (3 - 5 MeV) bombards a target, inelastically scattering with target nuclei and exciting them. Decay from this excited state produces characteristic gamma emissions. Collecting the resulting gamma energy spectrum allows identification of elements present in the target. As these gamma rays range in energy from 0.3 - 1.5 MeV, outside the useable energy range for existing gamma cameras (0.1 - 511 MeV), a new gamma imaging method must be developed. The purpose of this dissertation is to design and develop a near-field (less then 0.5 m) high-energy (0.3 - 1.5 MeV) gamma camera to facilitate planar NSECT imaging. Modifying a design implemented in space-based imaging (focus of infinity), a prototype camera was built. Experimental testing showed that the far-field space-based assumptions were inapplicable in the near-field. A new mathematical model was developed to describe the modulation behavior in the near-field. Additionally, a Monte Carlo simulation of the camera and imaging environment was developed. These two tools were used to facilitate optimization of the camera parameters. Simulated data was then used to reconstruct images for both small animal and human fields of view. Limitations of the camera design were identified and quantified. Image analysis demonstrated that the camera has the potential to identify regions of interest in a human field of view.
Download or read book A Compton Camera for Low Energy Gamma Ray Imaging in Nuclear Medicine Applications written by James Walter LeBlanc and published by . This book was released on 1999 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Evaluation of Gamma Imaging Systems of Compton and Hybrid Cameras written by Yuxin Feng and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For medical applications in proton therapy, a Compton camera system to image the gamma-ray emission during treatment was designed and investigated. Gamma rays and X-rays emitted during treatment illustrate the energy deposition along the path of the proton beams and provide an opportunity for online dose verification. This Compton camera is designed to be capable of imaging gamma rays in 3D and is one of the candidates for imaging gamma emission during the treatment of proton therapy beside of the approach of positron emission tomography. In order to meet the requirement for spatial resolution of approximately 5 mm or less to meaningfully verify the dose via imaging gamma rays of 511 keV to 2 MeV, position sensing techniques with pixilated LaBr3(Ce) crystal were applied in each detector. The pixilated LaBr3 (Ce) crystal was used in both the scattering and absorbing detectors. Image reconstruction algorithms of OS-EML were applied to obtain 3D images.
Download or read book Tests of a Compton Imaging Prototype in a Monoenergetic 4 44 MeV Photon Field a Benchmark Setup for Prompt Gamma ray Imaging Devices written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compton Camera for Spectroscopic Imaging from 100keV to 1MeV written by and published by . This book was released on 1906 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Compton cameras are a particularly interesting gamma-ray imaging technology because they have a large field of view and rely on electronic rather than mechanical collimation (lead). These systems produce two dimensional, spectroscopic images using data collected from spatially separated detector arrays. A single acquisition contains data to produce image signatures for each radionuclide in the field of view. Application of Compton cameras in field of astrophysics has proven the systems capability for imaging in the 1 to 30MeV range. Other potential applications, in the 100keV to 1MeV range, include nuclear material safeguards and nuclear medicine imaging. A particularly attractive feature for these applications is that the technology to produce a portable camera is now available due to improvements in solid state room-temperature detectors. The objective of this work is to investigate Compton camera technology for spectroscopic imaging of gamma rays in the 100keV to 1MeV range. To this end, accurate and efficient camera simulation capability will allow a variety of design issues to be explored before a full camera system is built. An efficient, specific purpose Monte Carlo code was developed to investigate the image formation process in Compton cameras. The code is based on a pathway sampling technique with extensive use of variance reduction techniques. In particular, the technique of forcing is used make each history result in a partial success. The code includes detailed Compton scattering physics, including incoherent scattering functions, Doppler broadening, and multiple scattering. Detector response functions are also included in the simulations. A prototype camera was built to provide code benchmarks and investigate implementation issues. The prototype is based on a two-detector system, which sacrifices detection efficiency for simplicity and versatility. One of the detectors is mounted on a computer controlled stage capable of two dimensional motion (14x14cm.
Download or read book Design and Operation of a Tunable MeV level Compton scattering based gamma ray Source written by and published by . This book was released on 2009 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mono-energetic gamma-ray (MEGa-ray) source based on Compton-scattering, targeting nuclear physics applications such as nuclear resonance fluorescence, has been constructed and commissioned at Lawrence Livermore National Laboratory. In this paper, the overall architecture of the system, as well as some of the critical design decisions made in the development of the source, are discussed. The performances of the two laser systems (one for electron production, one for scattering), the electron photoinjector, and the linear accelerator are also detailed, and initial [gamma]-ray results are presented.
Download or read book Calibration of Radiation Protection Monitoring Instruments written by International Atomic Energy Agency and published by . This book was released on 2000 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Safety Report provides guidance on the establishment and operation of calibration facilities for radiation monitoring instruments. It reflects the current internationally accepted principles and recommended practices in calibration procedures, taking account of the major changes and developments that have occurred over the past decade.
Download or read book Particle Physics Reference Library written by Christian W. Fabjan and published by Springer Nature. This book was released on 2020 with total page 1083 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second open access volume of the handbook series deals with detectors, large experimental facilities and data handling, both for accelerator and non-accelerator based experiments. It also covers applications in medicine and life sciences. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access
Download or read book Radiological Safety Aspects of the Operation of Electron Linear Accelerators written by William P. Swanson and published by Bernan Press(PA). This book was released on 1979 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron linear accelerators are being used throughout the world in increasing numbers in a variety of important applications. Foremost among these is their role in the treatment of cancer. Commercial uses include non-destructive testing by radiography, food preservation, product sterilization and radiation processing of materials such as plastics and adhesives. Scientific applications include investigations in radiation biology, radiation chemistry, nuclear and elementary particle physics and radiation research. This manual provides authoritative guidance in radiation protection for this important category of radiation sources.
Download or read book 14 MeV Neutrons written by Vladivoj Valkovic and published by CRC Press. This book was released on 2015-08-25 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the often difficult and time-consuming effort of performing experiments with fast (14 MeV) neutrons, these neutrons can offer special insight into nucleus and other materials because of the absence of charge. 14 MeV Neutrons: Physics and Applications explores fast neutrons in basic science and applications to problems in medicine, the envir
Download or read book Recent Advances in Ceramic Materials Research written by Joan Josep Roa Rovira and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic materials are usually considered as most brittle since they are full of defects, sometimes difficult to determine, that affect all their properties, from functional to mechanical. This book presents the most recent advances in the synthesis, processing and characterization of some ceramic materials. Hybrid organoceramics, lead-free piezoelectric ceramics, dental zirconia, raw clays and scintillator materials are presented, as well as different methods to evaluate their suitability for certain applications, such as a new approach based on the response surface methodology, the instrumented nanoindentation, or the use of thermal phonons. The relationship between functional characteristics of these materials and the manufacturing technology used to obtain them is also discussed in some chapters. A full review of a novel processing method to fabricate ceramic nanocomposites using SPS is also included.
