Performance and field tests of a handheld Compton camera using 3-D position-sensitive scintillators coupled to multi-pixel photon counter arrays

Kishimoto, A.; Kataoka, J.; Nishiyama, T.; Fujita, Takuya; Takeuchi, K.; Okochi, Hiroshi; Ogata, Hiroaki; Kuroshima, H.; Ohsuka, Shinji; Nakamura, Shigeyuki; Hirayanagi, M.; Adachi, S.; Uchiyama, Tetsuya; Suzuki, H.

doi:10.1088/1748-0221/9/11/p11025

Cited by 47 publications

(23 citation statements)

References 19 publications

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“…The time window for acquiring the coincidence events between the scatterer and the absorber was set to 200 ns. This camera was fabricated based on the technology of a handheld Compton camera jointly developed by Waseda University and Hamamatsu Photonics [12,13].…”

Section: Methodsmentioning

confidence: 99%

Radiation imaging using a compact Compton camera mounted on a crawler robot inside reactor buildings of Fukushima Daiichi Nuclear Power Station

Sato

Terasaka

Utsugi

et al. 2019

Journal of Nuclear Science and Technology

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The Fukushima Daiichi Nuclear Power Station (FDNPS), operated by Tokyo Electric Power Company Holdings, Inc., went into meltdown in the aftermath of a large tsunami caused by the Great East Japan Earthquake of 11 March 2011. Measurement of radiation distribution inside the FDNPS buildings is indispensable to execute decommissioning tasks in the reactor buildings. We conducted a radiation imaging experiment inside the reactor building of Unit 1 of FDNPS by using a compact Compton camera mounted on a crawler robot and remotely visualized gamma-rays streaming from deep inside the reactor building. Moreover, we drew a radiation image obtained using the Compton camera onto the three-dimensional (3-D) structural model of the experimental environment created using photogrammetry. In addition, the 3-D model of the real working environment, including the radiation image, was imported into the virtual space of the virtual reality system. These visualization techniques help workers recognize radioactive contamination easily and decrease their own exposure to radiation because the contamination cannot be observed with the naked eye.

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Section: Methodsmentioning

confidence: 99%

Radiation imaging using a compact Compton camera mounted on a crawler robot inside reactor buildings of Fukushima Daiichi Nuclear Power Station

Sato

Terasaka

Utsugi

et al. 2019

Journal of Nuclear Science and Technology

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“…The demands for Ce:GAGG-based Compton cameras rapidly increased after the Fukushima nuclear disaster in Japan in 2011 to measure the levels of different radioactive elements from a distance. Kataoka et al [ 118 , 119 , 120 ] developed a portable and handheld Compton camera based on a Ce:GAGG scintillator and MPPC with a depth-of-interaction (DOI) capability. The prototype Compton camera is shown in Figure 5 , which has been reprinted from Kataoka et al [ 118 ].…”

Section: Types Of Compton Camerasmentioning

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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“…Its fabrication is based on the technology of the handheld Compton camera jointly developed by Waseda University and Hamamatsu Photonics K.K. [12,13]. The scattering angles of the gamma rays on the scatterer were estimated by the Compton scattering formula.…”

Section: Three-dimensional Gamma-ray Imaging Using Sfm With a Freely Moving Compton Cameramentioning

confidence: 99%

Visualization of Radioactive Substances Using a Freely Moving Gamma-Ray Imager Based on Structure From Motion

Sato

Minemoto²,

Nemoto³

et al. 2021

Journal of Nuclear Engineering and Radiation Science

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Technology for measuring and identifying the positions and distributions of radioactive substances is important for decommissioning work sites at nuclear power stations. A three-dimensional (3D) image reconstruction method that locates radioactive substances by integrating Structure-from-Motion (SfM) with a Compton camera (a type of gamma-ray imager) has been developed. From the photographs captured while freely moving in an experimental environment, a 3D structural model of the experimental environment was created. By projecting the radioactive substance image acquired by the Compton camera on the 3D structural model, the positions of the radioactive substance were visualized in 3D space. In a demonstration study, the 137Cs-radiation source was successfully visualized in the experimental environment captured by the freely moving cameras. In addition, how the imaging accuracy is affected by uncertainty in the self-localization of the Compton camera processed by SfM, and by positional uncertainty in the gamma-ray incidence determined by the sensors of the Compton camera was investigated. The created map depicts the positions of radioactive substances inside radiation work environments, such as decommissioning work sites at nuclear power stations.

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Performance and field tests of a handheld Compton camera using 3-D position-sensitive scintillators coupled to multi-pixel photon counter arrays

Cited by 47 publications

References 19 publications

Radiation imaging using a compact Compton camera mounted on a crawler robot inside reactor buildings of Fukushima Daiichi Nuclear Power Station

Radiation imaging using a compact Compton camera mounted on a crawler robot inside reactor buildings of Fukushima Daiichi Nuclear Power Station

Development and Applications of Compton Camera—A Review

Visualization of Radioactive Substances Using a Freely Moving Gamma-Ray Imager Based on Structure From Motion

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