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Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 940:142-151
The sharing of charge between multiple pixels can significantly degrade the energy resolution of small pixelated compound semiconductor detectors. This paper describes an energy calibration and reconstruction technique to correct for absorbed energy
Publikováno v:
Physics in Medicine & Biology. 66:045031
Advances in gamma imaging technology mean that is now technologically feasible to conduct stereoscopic gamma imaging in a hand-held unit. This paper derives an analytical model for stereoscopic pinhole imaging which can be used to predict performance
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 976:164241
A fully spectroscopic Monte Carlo model has been developed to predict the spectroscopic performance of pixelated CdTe based detectors. The model incorporates photon attenuation by the photoelectric effect, Compton scattering and Rayleigh scattering.
Autor:
A.C. Perkins, Mohammed S. Alqahtani, Awad Almarhaby, J.E. Lees, W.R. McKnight, Layal K. Jambi, S.L. Bugby
Publikováno v:
Journal of Instrumentation. 14:P07007-P07007
A novel hand-held hybrid optical-gamma camera (HGC) has previously been described that is capable of displaying co-aligned images from both modalities in a single imaging system. Here, a dedicated NIR imaging system for NIR fluorescence surgical guid
Publikováno v:
Journal of Physics: Conference Series. 1248:012019
Recording gamma images using a hand held small field of view (SFOV) hybrid gamma camera requires a few minutes to complete an acquisition. Operator motion during image acquisition may deteriorate image quality and hence affect diagnostic accuracy. Th
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. :25-30
First results from a new simple simulation of X-ray spectroscopy with an Al0.8Ga0.2As p+–p−–n+ spectroscopic X-ray photon counting avalanche photodiode are presented and compared with experimentally obtained data. Particular attention is paid t
Publikováno v:
Applied Radiation and Isotopes. 68:2448-2451
There is now wide spread interest in the application of small field of view gamma cameras for clinical use in operating theatres, intensive care units and bedside imaging. The development of these imaging systems some of which have improved spatial r
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 537:621-625
We describe novel electronics for processing signals from a microchannel plate detector using a resistive anode readout. High sampling-rate (MHz) Analogue-to-Digital Converters (ADCs) coupled to a Digital Signal Processor (DSP) combine to offer high
Autor:
Numan S. Dawood, Mohammed S. Alqahtani, A.H. Ng, J.E. Lees, W.R. McKnight, A.C. Perkins, B.S. Bhatia, Layal K. Jambi, S.L. Bugby
Publikováno v:
Physica Medica. 32:256-257
Introduction The Hybrid Gamma Camera (HGC) is being developed to enhance the localisation of radiopharmaceutical uptake in targeted tissues during surgical procedures such as sentinel lymph node (SLN) biopsy. Purpose To assess the capability of the H