Performance evaluation of MACACO II Compton camera

Barrientos, L.; Borja-Lloret, Marina; Etxebeste, Ane; Muñoz, Enrique; Oliver, J.; Ros, Alberto; Röser, J.; Senra, C.; Viegas, Rita; Llosá, G.

doi:10.1016/j.nima.2021.165702

Cited by 15 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The newly developed CC was modeled using GATE v9.0, a Monte Carlo simulation toolkit based on Geant4. The CCMod actor in the GATE code is applied to compare the response of the new prototype developed between the experimental and simulated data [13,14].…”

Section: Monte Carlo Simulationmentioning

confidence: 99%

“…EM Opt4 is the best set of electromagnetic physics models selected from the low-energy and standard packages [20]. The cut values for gamma rays and the produced electrons for all geometries (scatterer, absorber, and reflectors) were set at 0.01 mm, matching one order magnitude less than their dimension [13,14]. The detector's intrinsic spatial resolution (FWHM) was set at 0.85 mm according to the pixel size of the scintillator.…”

Section: Monte Carlo Simulationmentioning

confidence: 99%

“…The results confirm that the new CCMod developed in the GATE code is a reliable tool to simulate the CC and reproduce the experimental data. Some differences in the results are due to non-defined passive geometries in the GATE code to simplify the simulation, affecting the extent of generated random and back-scattering events [13,14]. For example, the difference in the 100-200-keV region between the experiments and simulations in figure 5 is primarily due to reduced random and backscatter events produced by non-simulated passive material (SiPMs, reflector, holder, electronic boards, etc.)…”

Section: Jinst 17 P10012mentioning

confidence: 99%

“…In this study, the imaging performance of our newly developed CC was evaluated using point sources (Na-22 and Cs-137), and we compared it with our previous CC. Experimental measurements and Monte Carlo GATE simulation [13,14] determined the imaging capability of the old and new prototype CCs. The imaging capability of the new prototype CC, including angular resolution, spatial resolution, absolute detection efficiency (DE 𝑎 ) (cps/MBq), and photopeak detection efficiency (DE 𝑝 ) (cps/MBq), was determined by experimental measurements and Monte Carlo GATE simulations as figures of merit [13,14] and then compared with the old CC.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The performance study of developed cost-effective Compton Camera based on Ce:GAGG scintillator using experimental measurements and CCMod of GATE simulation module

et al. 2022

View full text Add to dashboard Cite

In our previous work, a cost-effective Compton camera (CC) using Ce doped Gd3(Al,Ga)5O12(Ce:GAGG) scintillator consisting of two detectors, scatterer (20.8 × 20.8 × 5 mm3) and absorber (41.7 × 41.7 × 10 mm3), was developed to image gamma rays having energy more than 511 keV. This study fabricated a newly developed CC with a larger scatterer and thinner absorber. The system consists of two detectors: a scatterer and an absorber of Ce:GAGG scintillator. The size of the scatterer and absorber is the same; a 40-mm × 40-mm × 5-mm array block consists of 40 × 40 pixels. The size of each scintillator pixel is 0.85 mm × 0.85 mm for both systems. Imaging experiments of Na-22 and Cs-137 point sources were performed to investigate the imaging capability of the new camera, and then the obtained data were compared to the previous CC. The current CC's absolute detection efficiency (DE a ) and photopeak detection efficiency (DE p ) are improved by 1.6 and 2 times greater than the previous one. At the same time, both systems' spatial and angular resolutions are almost the same value at 511 keV. The Compton camera module (CCMod) in GATE v9.0 was employed for Monte Carlo simulations to reproduce the experimental data showing a good agreement.

show abstract

Section: Monte Carlo Simulationmentioning

confidence: 99%

Section: Monte Carlo Simulationmentioning

confidence: 99%

Section: Jinst 17 P10012mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The performance study of developed cost-effective Compton Camera based on Ce:GAGG scintillator using experimental measurements and CCMod of GATE simulation module

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Barrientos et al [ 142 ] is currently working on the development and updating of LaBr 3 -coupled SiPM-based Compton cameras (MACACO II) for proton beam monitoring. The MACACO II exhibits an energy resolution of 5.6% (FWHM) at 511 keV and an angular resolution of 8°.…”

Section: Types Of Compton Camerasmentioning

confidence: 99%

Development and Applications of Compton Camera—A Review

Parajuli

Sakai

Parajuli³

et al. 2022

Sensors

View full text Add to dashboard Cite

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.

show abstract