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Ultracompact Compton Camera for Innovative Gamma-ray Imaging
- Source :
- Nuclear Instruments and Methods in Physics Research Section A. 912:1-5
- Publication Year :
- 2018
- Publisher :
- Elsevier, 2018.
-
Abstract
- A multipixel photon counter (MPPC) features excellent photon-counting capability as a radiation detector. In particular, a two-plane Compton camera consisting of Ce:GAGG scintillators coupled with MPPC arrays has significant application potential owing to its compact size and low weight. For example, the camera can be easily mounted on a commercial drone to identify radiation hot spots from the sky. In Fukushima, we demonstrated that a Cs-137 distribution within a 100 m diameter can be mapped correctly within a couple of tens of minutes. The advanced use of the Compton camera is also anticipated in the field of proton therapy. We evaluated an image of 511 keV annihilation gamma-rays emitted from a PMMA phantom irradiated by 200 MeV protons to mimic an in-beam monitor for proton therapy. Finally, we developed an ultracompact Compton camera (weight = 580 g), for 3-D multicolor molecular imaging. In order to demonstrate the performance capabilities of the device, I-131 (365 keV) , Sr-85 (SrCl2, 514 keV), and Zn-65 (ZnCl2, 1116 keV) were injected into a living mouse and the data were taken from 12 angles with a total acquisition time of 2 h. We confirmed that all tracers had accumulated on the target organs of the thyroid, bone, and liver, and that the obtained 3-D image was quantitatively correct with an accuracy of ±20%.
- Subjects :
- Astrophysics::High Energy Astrophysical Phenomena
Subjects
Details
- Language :
- English
- ISSN :
- 01689002
- Volume :
- 912
- Database :
- OpenAIRE
- Journal :
- Nuclear Instruments and Methods in Physics Research Section A
- Accession number :
- edsair.jairo.........e7c72538d10e54f1f1508d6da631a607