Characterization of a Compton camera based on the TOFPET2 ASIC

Viegas, Rita; Röser, J.; Barrientos, L.; Borja-Lloret, Marina; Casaña, J.V.; López, J. Garcı́a; Jiménez-Ramos, M. C.; Hueso-González, F.; Ros, Alberto; Llosá, G.

doi:10.1016/j.radphyschem.2022.110507

Cited by 8 publications

(6 citation statements)

References 40 publications

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“…These values represent an enhancement compared to the 5.6 and 6.6% of its predecessor (Barrientos et al, 2021). These results were also superior to other CCs based on SiPMs for different approaches, such as hadron therapy treatment monitoring with MACACOp (6.6% and 6.4% FWHM at 511 keV) (Viegas et al, 2022) or Compton-PET applications (8.3% FWHM at 511 keV) (Takyu et al, 2021). The SiPM characterization at controlled temperatures indicates that the new detectors provide a three times reduction in the effect of temperature fluctuations compared to the 50 μm model (Solevi Barrio et al, 2018).…”

Section: Discussionmentioning

confidence: 70%

“…The reported CTR value indicates that there is room for improvement in terms of timing resolution. In addition to time-walk correction strategies, an alternative prototype known as MACACOp using TOF-PET2 ASIC (PETSyS) is under evaluation with the aim of improving this parameter (Viegas et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…The prototype detector size significantly limits the efficiency of the system (Barrientos et al, 2021). Thus, this study, unlike those carried out previously in which the intrinsic efficiency has only been studied for the detectors experimental size (Muñoz et al, 2017;Viegas et al, 2022), allows us to estimate the efficiency and the effect of enlarging the crystals in a future prototype. Simulations were performed using different geometrical configurations, as shown in Table 1.…”

Section: Detector Size Studiesmentioning

confidence: 99%

See 2 more Smart Citations

System Characterization and Performance Studies with Macaco Iii Compton Camera

Barrientos¹,

Borja-Lloret²,

Casaña³

et al. 2022

SSRN Journal

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Detector Size Studiesmentioning

confidence: 99%

See 1 more Smart Citation

System Characterization and Performance Studies with Macaco Iii Compton Camera

Barrientos¹,

Borja-Lloret²,

Casaña³

et al. 2022

SSRN Journal

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“…The MACACO II prototype was composed of two identical detector modules. Each one consisted of a 25.8 × 25.8 × 5 mm 3 LaBr 3 monolithic scintillation crystal [43]. Different multi-slit prompt gamma cameras were developed.…”

Section: Introductionmentioning

confidence: 99%

Compact pixelated scintillator detector investigation for gamma ray detection

Wang,

Wu,

et al. 2024

Eng. Res. Express

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A scintillator is a luminescent material that converts high-energy photons into visible light and is widely used in medical imaging. The energy resolution, detection efficiency and position measurement of pixelated scintillators coupled to a SiPM were investigated via two kinds of detectors. The goal of this manuscript was to accurately measure the gamma source position through spectrum analysis in selection of energy windows for characteristic gamma lines. In this manuscript, scintillators were effectively manufactured and encapsulated before testing, especially for the easily deliquescent LaBr3. The compact front-end electronic prototype modules with 2×2 array SiPMs in stacked form and 1×10 array SiPMs in parallel form were developed for gamma ray energy resolution and efficiency measurements with a radioactive source of 22Na, which had two energy gamma lines at 511 keV and 1274 keV.

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“…Time resolution is a limitation in MACACO III-with 50 ns TCW reported in Barrientos et al (2021) and a timing resolution of 24 ns FWHM-. This is the reason why an alternative prototype, named MACACOp, is being developed in parallel, with TOFPET2 ASIC as readout electronics, with 1.50 ns FWHM and a TCW of 10 ns (Viegas et al 2023). Results in in-beam tests carried out by MACACOp have been also presented in Viegas et al (2023).…”

Section: Introductionmentioning

confidence: 99%

Influence of the background in Compton camera images for proton therapy treatment monitoring

et al. 2023

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Objective. Background events are one of the most relevant contributions to image degradation in Compton camera imaging for hadron therapy treatment monitoring. A study of the background and its contribution to image degradation is important to define future strategies to reduce the background in the system. Approach. In this simulation study, the percentage of different kinds of events and their contribution to the reconstructed image in a two-layer Compton camera have been evaluated. To this end, GATE v8.2 simulations of a proton beam impinging on a PMMA phantom have been carried out, for different proton beam energies and at different beam intensities. Main results. For a simulated Compton camera made of Lanthanum (III) Bromide monolithic crystals, coincidences caused by neutrons arriving from the phantom are the most common type of background produced by secondary radiations in the Compton camera, causing between 13\% and 33\% of the detected coincidences, depending on the beam energy. Results also show that random coincidences are a significant cause of image degradation at high beam intensities, and their influence in the reconstructed images is studied for values of the time coincidence windows from 500 ps to 100 ns. Significance. Results indicate the timing capabilities required to retrieve the fall-off position with good precision. Still, the noise observed in the image when no randoms are considered make us consider further background rejection methods.

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Characterization of a Compton camera based on the TOFPET2 ASIC

Cited by 8 publications

References 40 publications

System Characterization and Performance Studies with Macaco Iii Compton Camera

System Characterization and Performance Studies with Macaco Iii Compton Camera

Compact pixelated scintillator detector investigation for gamma ray detection

Influence of the background in Compton camera images for proton therapy treatment monitoring

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