Detector and telescope development for ProtoEXIST and fine beam measurements of spectral response of CZT detectors

Hong, Jaesub; Copete, A.; Grindlay, J. E.; Vadawale, S.; Craig, William W.; Harrison, Fiona A.; Cook, W. R.; Gehrels, N.

doi:10.1117/12.617630

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…When triggered, this ASIC provides readout of a trigger signal, pixel channel number, and the amplified event signal [48]. This ASIC does not support multi-pixel readout, as only a single peak pixel value is recorded during multi-pixel events [120]. The amplified event signal is then digitized within the detector module to give a 0-4095 energy channel value that is output as list-mode data alongside a timestamp and pixel number [43,45].…”

Section: Readoutsmentioning

confidence: 99%

Intraoperative Gamma Cameras: A Review of Development in the Last Decade and Future Outlook

Farnworth

Bugby

2023

J. Imaging

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Portable gamma cameras suitable for intraoperative imaging are in active development and testing. These cameras utilise a range of collimation, detection, and readout architectures, each of which can have significant and interacting impacts on the performance of the system as a whole. In this review, we provide an analysis of intraoperative gamma camera development over the past decade. The designs and performance of 17 imaging systems are compared in depth. We discuss where recent technological developments have had the greatest impact, identify emerging technological and scientific requirements, and predict future research directions. This is a comprehensive review of the current and emerging state-of-the-art as more devices enter clinical practice.

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Section: Readoutsmentioning

confidence: 99%

Intraoperative Gamma Cameras: A Review of Development in the Last Decade and Future Outlook

Farnworth

Bugby

2023

J. Imaging

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“…The ASICs used by CZT-based focusing telescope experiments such as the High Energy Focusing Telescope (HEFT) and the Nuclear Spectroscopic Telescope Array (NuSTAR) use capacitor banks to sample preamplifier outputs [10]. Another version of this ASIC known as the RadNet ASIC has been used for the Energetic X-ray Imaging Survey Telescope (EXIST) mission [27,28] as well as homeland security applications [12].…”

Section: Readout Electronics Backgroundmentioning

confidence: 99%

Event classification in 3D position sensitive semiconductor detectors

Anderson

Kim

2008

2008 IEEE Nuclear Science Symposium Conference Record

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A set of analytical methods for pixelated 3D position sensitive semiconductor detectors has been developed to make better measurements of gamma-rays in the 30 keV to 3 MeV energy range. The ability to classify pixel charge sharing, xray escape, pair production, and Compton scattering allows for more accurate and efficient energy reconstruction and Compton imaging routines. The techniques are based on the analysis of digitized preamplifier waveforms from the electrodes that sense charge following an interaction. Accurate identification of an event is based on the comparison of an expected detector response with precise measurements of an interaction's resulting signal amplitude, shape, and timing characteristics. A tungsten collimator is used to demonstrate the accuracy of the classification methods. Experimental results taken with large volume CZT and HgI2 detectors are compared with system simulations.

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“…In this paper, we review our detector design and package concept and report the current development status of the program using our basic detector units. Hong et al (2005) outlined the initial detector plane design concept for ProtoEXIST1 [3]. Since then, we have made a few changes to improve our packaging concept to resolve practical concerns that became apparent during development.…”

Section: Introductionmentioning

confidence: 99%

CZT imaging detectors for Proto EXIST

et al. 2006

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We describe the detector development for a balloon-borne wide-field hard X-ray (20 -600 keV) telescope, ProtoEXIST. ProtoEXIST is a pathfinder for both technology and science of the proposed implementation of the Black Hole Finder Probe, Energetic X-ray Imaging Survey telescope (EXIST). The principal technology challenge is the development of large area, close-tiled modules of imaging CZT detectors (1000 cm 2 for ProtoEXIST1). We review the updates of the detector design and package concept for ProtoEXIST1 and report the current development status of the CZT detectors, using calibration results of our basic detector unit -2 x 2 x 0.5 cm CZT crystals with 2.5 mm pixels (8 x 8 array). The current prototype (Rev1) of our detector crystal unit (DCU) shows ~4.5 keV electronics noise (FWHM), and the radiation measurements show the energy resolution (FWHM) of the units is 4.7 keV (7.9%) at 59.5 keV, 5.6 keV (4.6%) at 122 keV, and 7.6 keV (2.1%) at 356 keV. The new (Rev2) DCU with revised design is expected to improve the resolution by ~30%.

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Detector and telescope development for ProtoEXIST and fine beam measurements of spectral response of CZT detectors

Cited by 3 publications

References 7 publications

Intraoperative Gamma Cameras: A Review of Development in the Last Decade and Future Outlook

Intraoperative Gamma Cameras: A Review of Development in the Last Decade and Future Outlook

Event classification in 3D position sensitive semiconductor detectors

CZT imaging detectors for Proto EXIST

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