Compton imaging reconstruction methods: a comparative performance study of direct back-projection, SOE, a new Bayesian algorithm and a new Compton inversion method applied to real data with Caliste

Daniel, G.; Limousin, O.; Maier, Daniel; Meuris, A.; Carrel, F.

doi:10.1051/epjconf/202022506006

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…However, the convergence speed of the adopted iterative reconstruction method was not sufficiently high because the imaging algorithms considered the high-energy γ-ray source located at a far distance, and the simulation programs developed at that time considered the simple detector system. Some studies have recently been conducted to improve the MLEM and compare it with other imaging models, with a focus on the application of Compton cameras in nuclear medicine and particle therapy [ 81 , 210 , 211 , 212 , 213 ]. Yabu et al [ 214 ] reported the superiority of the LM-MLEM method over SBP using a Si/CdTe Compton camera.…”

Section: Image Reconstruction Methods For Compton Imagingmentioning

confidence: 99%

Development and Applications of Compton Camera—A Review

Parajuli

Sakai

Parajuli³

et al. 2022

Sensors

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The history of Compton cameras began with the detection of radiation sources originally for applications in astronomy. A Compton camera is a promising γ-ray detector that operates in the wide energy range of a few tens of keV to MeV. The γ-ray detection method of a Compton camera is based on Compton scattering kinematics, which is used to determine the direction and energy of the γ-rays without using a mechanical collimator. Although the Compton camera was originally designed for astrophysical applications, it was later applied in medical imaging as well. Moreover, its application in environmental radiation measurements is also under study. Although a few review papers regarding Compton cameras have been published, they either focus very specifically on the detectors used in such cameras or the particular applications of Compton cameras. Thus, the aim of this paper is to review the features and types of Compton cameras and introduce their applications, associated imaging algorithms, improvement scopes, and their future aspects.

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Section: Image Reconstruction Methods For Compton Imagingmentioning

confidence: 99%

Development and Applications of Compton Camera—A Review

Parajuli

Sakai

Parajuli³

et al. 2022

Sensors

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show abstract

“…For events with ≥2 triggered pixels, we can use Compton imaging to suppress events which cannot possibly come from the γ-ray optics. 77,78 A possible design optimization is the use of "staggered detector layers" in which the layers are offset slightly to reduce the loss of photons that hit the gaps of the detector assembly. A full tradeoff study that accounts for the gain of detected photons but also evaluates the effect on the energy resolution is outside the scope of this paper.…”

Section: Simulations Of the Focal Plane Detectormentioning

confidence: 99%

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

Shirazi

Gau

Hossen

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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The 511 keV γ-ray emission from the galactic center region may fully or partially originate from the annihilation of positrons from dark matter particles with electrons from the interstellar medium. Alternatively, the positrons could be created by astrophysical sources, involving exclusively standard model physics. We describe here a new concept for a 511 keV mission called 511-CAM (511 keV gamma-ray camera using microcalorimeters) that combines focusing γ-ray optics with a stack of transition edge sensor microcalorimeter arrays in the focal plane. The 511-CAM detector assembly has a projected 511 keV energy resolution of 390 eV full width half maximum or better, and improves by a factor of at least 11 on the performance of state-of-the-art Ge-based Compton telescopes. Combining this unprecedented energy resolution with sub-arcmin angular resolutions afforded by Laue lens or channeling optics could make substantial contributions toward identifying the origin of the 511 keV emission through discovering and characterizing point sources and measuring line-of-sight velocities of the emitting plasmas.

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“…For events with ≥2 triggered pixels, we can use Compton imaging to suppress events which cannot possibly come from the γ-ray optics. 70,71 7 Predicted performance of a balloon-borne 511-CAM mission One of the key elements of the detector response is the instrument efficiency or effective area, which, for the 511-CAM, consists of both lens and detector efficiency. The simulation code calculates the channeling efficiency by using the relation…”

Section: Simulations Of the Focal Plane Detectormentioning

confidence: 99%

The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays

Shirazi¹,

Hossen²,

Becker³

et al. 2022

Preprint

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The 511 keV γ-ray emission from the galactic center region may fully or partially originate from the annihilation of positrons from dark matter particles with electrons from the interstellar medium. Alternatively, the positrons could be created by astrophysical sources, involving exclusively standard model physics. We describe here a new concept for a 511 keV mission called 511-CAM (511 keV gamma-ray CAmera using Micro-calorimeters) that combines focusing γ-ray optics with a stack of Transition Edge Sensor (TES) microcalorimeter arrays in the focal plane. The 511-CAM detector assembly has a projected 511 keV energy resolution of 390 eV Full Width Half Maximum (FWHM) or better, and improves by a factor of at least 11 on the performance of state-of-the-art Ge-based Compton telescopes. Combining this unprecedented energy resolution with sub-arcmin angular resolutions afforded by Laue lens or channeling optics could make substantial contributions to identifying the origin of the 511 keV emission by discovering and characterizing point sources and measuring line-of-sight velocities of the emitting plasmas.

show abstract

Compton imaging reconstruction methods: a comparative performance study of direct back-projection, SOE, a new Bayesian algorithm and a new Compton inversion method applied to real data with Caliste

Cited by 11 publications

References 20 publications

Development and Applications of Compton Camera—A Review

Development and Applications of Compton Camera—A Review

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays

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