<title>X-ray and gamma-ray imaging with monolithic CdZnTe detector arrays</title>

Gamma-ray astrophysics in the energy range between 30 MeV and 30 GeV is in desperate need of arcminute angular resolution and source monitoring capability. The AGILE Mission planned to be operational in 2004-2006 will be the only space mission entirely dedicated to gamma-ray astrophysics above 30 MeV. The main characteristics of AGILE are the simultaneous X-ray and gamma-ray imaging capability (reaching arcminute resolution) and excellent gamma-ray timing (10-100 microseconds). AGILE scientific program will emphasize a quick response to gamma-ray transients and multiwavelength studies of gamma-ray sources.

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Experimental Study of Using a 3-D Position Sensitive CdZnTe Detector for Proton Beam Range Verification

10.36227/techrxiv.13717834.v1 ◽

2021 ◽

Author(s):

Valerie Nwadeyi ◽

Paul maggi ◽

Zhong He ◽

Jerimy Polf

Keyword(s):

Proton Beam ◽

Expectation Maximization ◽

Gamma Ray ◽

Prompt Gamma ◽

Cdznte Detector ◽

Maximum Likelihood Expectation Maximization ◽

Gamma Ray Imaging ◽

Position Sensitive ◽

Beam Range ◽

Range Verification

This manuscript discusses the use of a large volume array CZT detector for experimental prompt gamma-ray imaging. Namely, the 718 keV and the 4.44 MeV photopeaks produced from proton-carbon interactions are imaged using maximum likelihood expectation maximization (MLEM). Various proton beam irradiations are used to characterize the feasibility of using both photopeaks for beam range verification.

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Precision linear and two-dimensional scintillation crystal arrays for x-ray and gamma-ray imaging applications

10.1117/12.366582 ◽

1999 ◽

Cited By ~ 6

Author(s):

David J. Krus ◽

William P. Novak ◽

Louis Perna

Keyword(s):

Gamma Ray ◽

Two Dimensional ◽

Scintillation Crystal ◽

X Ray ◽

Gamma Ray Imaging

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Development of a Mercuric Iodide Detector Array For In-Vivo X-Ray Imaging

Advances in X-ray Analysis ◽

10.1154/s0376030800018310 ◽

1994 ◽

Vol 38 ◽

pp. 615-624

Author(s):

Bradley E. Patt ◽

Jan S. Iwanczyk ◽

Martin P. Tornai ◽

Craig S. Levin ◽

Edward J. Hoffman

Keyword(s):

Gamma Camera ◽

Gamma Ray ◽

Active Area ◽

Detector Array ◽

Mercuric Iodide ◽

X Ray ◽

X Ray Imaging ◽

Spatial Performance ◽

Gamma Ray Imaging

Abstract A nineteen element mercuric iodide (HgI2) detector array has been developed in order to investigate the potential of using this technology for in-vivo x-ray and gamma-ray imaging. A prototype cross-grid detector array was constructed with hexagonal pixels of 1.9 mm diameter (active area = 3.28 mm2) and 0.2 mm thick septa. The overall detector active area is roughly 65 mm2. A detector thickness of 1.2 mm was used to achieve about 100% efficiency at 60 keV and 67% efficiency at 140 keV The detector fabrication, geometry and structure were optimized for charge collection and to minimize crosstalk between elements. A section of a standard high resolution cast-lead gamma-camera collimator was incorporated into the detector to provide collimation matching the discrete pixel geometry. Measurements of spectral and spatial performance of the array were made using 241-Am and 99m-Tc sources. These measurements were compared with similar measurements made using an optimized single HgI2 x-ray detector with active area of about 3 mm2 and thickness of 500 μm.

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