Joshua W. Cates
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View article: Simulation Study of a Scintillation Photon Counting TOF-PET Detector Using a Monolithic Crystal and SiPM Array
Simulation Study of a Scintillation Photon Counting TOF-PET Detector Using a Monolithic Crystal and SiPM Array Open
View article: Demonstration of a new CLLBC-based gamma- and neutron-sensitive free-moving omnidirectional imaging detector
Demonstration of a new CLLBC-based gamma- and neutron-sensitive free-moving omnidirectional imaging detector Open
We have developed a CLLBC-based gamma- and neutron-sensitive multi-channel omnidirectional imaging detector, suitable for handheld or vehicle-borne operation and capable of quantitative radiation mapping in 3D. The system comprises 62 CLLB…
View article: High-Performance Dual-Ended SiPM Readout for TOF-PET With BGO and LYSO:Ce
High-Performance Dual-Ended SiPM Readout for TOF-PET With BGO and LYSO:Ce Open
Detection time performance is a key aspect for time-of-flight positron emission tomography. With recent advancement in SiPM technology and fast readout electronics, one limiting factor on timing performance is light transport in the crysta…
View article: Optical Crosstalk between Sipms in Dual-Ended Readout
Optical Crosstalk between Sipms in Dual-Ended Readout Open
View article: Demonstration of LGADs and Cherenkov Gamma Detectors for Prompt Gamma Timing Proton Therapy Range Verification
Demonstration of LGADs and Cherenkov Gamma Detectors for Prompt Gamma Timing Proton Therapy Range Verification Open
The great potential for precision dose delivery with proton therapy remains to be fully exploited, largely due to uncertainties in range that require additional conservative treatment margins. Analysis of time distributions from prompt gam…
View article: Enhancing timing performance of heterostructures with double-sided readout
Enhancing timing performance of heterostructures with double-sided readout Open
Objective. Heterostructured scintillators offer a promising solution to balance the sensitivity and timing in TOF-PET detectors. These scintillators utilize alternating layers of materials with complementary properties to optimize performa…
View article: Characterization of a SiPM-based monolithic neutron scatter camera using dark counts
Characterization of a SiPM-based monolithic neutron scatter camera using dark counts Open
The Single Volume Scatter Camera (SVSC) Collaboration aims to develop portable neutron imaging systems for a variety of applications in nuclear non-proliferation. Conventional double-scatter neutron imagers are composed of several separate…
View article: Tetris-inspired detector with neural network for radiation mapping
Tetris-inspired detector with neural network for radiation mapping Open
View article: Scintillation and cherenkov photon counting detectors with analog silicon photomultipliers for TOF-PET
Scintillation and cherenkov photon counting detectors with analog silicon photomultipliers for TOF-PET Open
Objective. Standard signal processing approaches for scintillation detectors in positron emission tomography (PET) derive accurate estimates for 511 keV photon time of interaction and energy imparted to the detection media from aggregate c…
View article: Characterization of external optical crosstalk reduction for SiPM-based scintillation detectors with an optical bandpass filter
Characterization of external optical crosstalk reduction for SiPM-based scintillation detectors with an optical bandpass filter Open
External optical crosstalk remains a significant source of correlated noise in scintillation detectors optically coupled to silicon photomultiplier (SiPM) arrays and can influence achievable performance by limiting the maximum overvoltage …
View article: First experimental demonstration of Gamma-ray LiDAR with a quasi-monoenergetic photon beam
First experimental demonstration of Gamma-ray LiDAR with a quasi-monoenergetic photon beam Open
View article: Scintillation and Cherenkov Photon Counting Detectors with Analog Silicon Photomultipliers for TOF-PET
Scintillation and Cherenkov Photon Counting Detectors with Analog Silicon Photomultipliers for TOF-PET Open
Standard signal processing approaches for scintillation detectors in positron emission tomography (PET) derive accurate estimates for 511 keV photon time of interaction and energy imparted to the detection media from aggregate characterist…
View article: Scintillation and Cherenkov Photon Counting Detectors with Analog Silicon Photomultipliers for TOF-PET
Scintillation and Cherenkov Photon Counting Detectors with Analog Silicon Photomultipliers for TOF-PET Open
Standard signal processing approaches for scintillation detectors in positron emission tomography (PET) derive accurate estimates for 511 keV photon time of interaction and energy imparted to the detection media from aggregate characterist…
View article: Characterization of a SiPM-based monolithic neutron scatter camera using dark counts
Characterization of a SiPM-based monolithic neutron scatter camera using dark counts Open
We report on the design and characterization of a prototype monolithic neutron scatter camera that is intended to significantly improve upon the geometrical shortcomings of conventional neutron cameras. The detector consists of a 50 mm $\t…
View article: Low power implementation of high frequency SiPM readout for Cherenkov and scintillation detectors in TOF-PET
Low power implementation of high frequency SiPM readout for Cherenkov and scintillation detectors in TOF-PET Open
State-of-the-art (SoA) electronic readout for silicon photomultiplier (SiPM)-based scintillation detectors that demonstrate experimental limits in achievable coincidence time resolution (CTR) leverage low noise, high frequency signal proce…
View article: Front-End Design for SiPM-Based Monolithic Neutron Double Scatter Imagers
Front-End Design for SiPM-Based Monolithic Neutron Double Scatter Imagers Open
Neutron double scatter imaging exploits the kinematics of neutron elastic scattering to enable emission imaging of neutron sources. Due to the relatively low coincidence detection efficiency of fast neutrons in organic scintillator arrays,…
View article: Cherenkov Radiation–Based Coincidence Time Resolution Measurements in BGO Scintillators
Cherenkov Radiation–Based Coincidence Time Resolution Measurements in BGO Scintillators Open
Bismuth germanate oxide (BGO) scintillators can be re-introduced in time-of-flight positron emission tomography (TOF-PET) by exploiting the Cherenkov luminescence emitted as a result from 511 keV interactions. Accessing the timing informat…
View article: Investigation of Electronic Signal Processing Chains for a Prototype TOF-PET System With 100-ps Coincidence Time Resolution
Investigation of Electronic Signal Processing Chains for a Prototype TOF-PET System With 100-ps Coincidence Time Resolution Open
We have evaluated CTR performance of four different mixed-signal front-end electronic readout configurations with the goal to achieve 100 picoseconds (ps) coincidence time resolution (CTR). The proposed TOF-PET detector elements are based …
View article: Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the Scene
Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the Scene Open
Using a series of detector measurements taken at different locations to localize a source of radiation is a well-studied problem. The source of radiation is sometimes constrained to a single point-like source, in which case the location of…
View article: Single Photon Counting Scintillation Detectors with Analog Silicon Photomultipliers.
Single Photon Counting Scintillation Detectors with Analog Silicon Photomultipliers. Open
View article: Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the Scene
Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the Scene Open
Using a series of detector measurements taken at different locations to localize a source of radiation is a well-studied problem. The source of radiation is sometimes constrained to a single point-like source, in which case the location of…
View article: Study of optical reflectors for a 100ps coincidence time resolution TOF-PET detector design
Study of optical reflectors for a 100ps coincidence time resolution TOF-PET detector design Open
Positron Emission Tomography (PET) reconstructed image signal-to-noise ratio (SNR) can be improved by including the 511 keV photon pair coincidence time-of-flight (TOF) information. The degree of SNR improvement from this TOF capability de…
View article: Scalable electronic readout design for a 100 ps coincidence time resolution TOF-PET system
Scalable electronic readout design for a 100 ps coincidence time resolution TOF-PET system Open
We have developed a scalable detector readout design for a 100 ps coincidence time resolution (CTR) time of flight (TOF) positron emission tomography (PET) detector technology. The basic scintillation detectors studied in this paper are ba…
View article: Reconstructing the Position and Intensity of Multiple Gamma-Ray Point Sources With a Sparse Parametric Algorithm
Reconstructing the Position and Intensity of Multiple Gamma-Ray Point Sources With a Sparse Parametric Algorithm Open
We present an experimental demonstration of Additive Point Source\nLocalization (APSL), a sparse parametric imaging algorithm that reconstructs\nthe 3D positions and activities of multiple gamma-ray point sources. Using a\nhandheld gamma-r…
View article: The Single-Volume Scatter Camera
The Single-Volume Scatter Camera Open
The multi-institution Single-Volume Scatter Camera (SVSC) collaboration led by Sandia National Laboratories (SNL) is developing a compact, high-efficiency double-scatter neutron imaging system. Kinematic emission imaging of fission-energy …
View article: 3D Gamma-ray and Neutron Mapping in Real-Time with the Localization and Mapping Platform from Unmanned Aerial Systems and Man-Portable Configurations
3D Gamma-ray and Neutron Mapping in Real-Time with the Localization and Mapping Platform from Unmanned Aerial Systems and Man-Portable Configurations Open
Nuclear Scene Data Fusion (SDF), implemented in the Localization and Mapping Platform (LAMP) fuses three-dimensional (3D), real-time volumetric reconstructions of radiation sources with contextual information (e.g. LIDAR, camera, etc.) der…
View article: Electronics method to advance the coincidence time resolution with bismuth germanate
Electronics method to advance the coincidence time resolution with bismuth germanate Open
Exploiting the moderate Cherenkov yield from 511 keV photoelectric interactions in bismuth germanate (BGO) scintillators enables one to achieve a level of coincidence time resolution (CTR) appropriate for time-of-flight positron emission t…
View article: Advances in Nuclear Radiation Sensing: Enabling 3-D Gamma-Ray Vision
Advances in Nuclear Radiation Sensing: Enabling 3-D Gamma-Ray Vision Open
The enormous advances in sensing and data processing technologies in combination with recent developments in nuclear radiation detection and imaging enable unprecedented and “smarter” ways to detect, map, and visualize nuclear radiation. T…
View article: Evaluation of a clinical TOF-PET detector design that achieves ⩽100 ps coincidence time resolution
Evaluation of a clinical TOF-PET detector design that achieves ⩽100 ps coincidence time resolution Open
Commercially available clinical positron emission tomography (PET) detectors employ scintillation crystals that are long ([Formula: see text]20 mm length) and narrow (4-5 mm width) optically coupled on their narrow end to a photosensor. Th…
View article: Highly multiplexed signal readout for a time-of-flight positron emission tomography detector based on silicon photomultipliers
Highly multiplexed signal readout for a time-of-flight positron emission tomography detector based on silicon photomultipliers Open
Maintaining excellent timing resolution in the generation of silicon photomultiplier (SiPM)-based time-of-flight positron emission tomography (TOF-PET) systems requires a large number of high-speed, high-bandwidth electronic channels and c…