Last Results of a First Compton Probe Demonstrator

A first prostate probe prototype based on the Compton imaging technique has been developed, with a scatter detector composed of a stack of five thick silicon pad detectors, and a scintillator as absorption detector. The silicon sensors are 4 cm times 1 cm, 1 mm thick, with 1.4 mm times 1.4 mm pad di...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2008-06, Vol.55 (3), p.936-941
Main Authors: Llosa, G., Bernabeu, J., Burdette, D., Chesi, E., Clinthorne, N.H., Honscheid, K., Kagan, H., Lacasta, C., Mikuz, M., Modesto, P., Rogers, W.L., Studen, A., Weilhammer, P.
Format: Article
Language:English
Subjects:
Absorption
Compton imaging
Detectors
Devices
Electromagnetic scattering
Energy resolution
Image reconstruction
Imaging
Particle scattering
Probes
Prostate
prostate cancer
Prototypes
Scatter
Sensors
Silicon
silicon detectors
Spatial resolution
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Summary:A first prostate probe prototype based on the Compton imaging technique has been developed, with a scatter detector composed of a stack of five thick silicon pad detectors, and a scintillator as absorption detector. The silicon sensors are 4 cm times 1 cm, 1 mm thick, with 1.4 mm times 1.4 mm pad dimensions. The scatter detector performance has been optimized, and an energy resolution about 1.4 keV FWHM is obtained. The absorption detector consists of three Nal(Tl) scintillators that are placed around the scatter detector. A spatial resolution of 5 mm FWHM has been measured reconstructing an image of a point-like 133 Ba source placed at 11 cm distance from the scatter detector. Additional studies show the improvement of the detector resolution with increasing incident photon energy and relative distance from the scatter to the absorption detector. Simulations have also been performed for a complete understanding of the data, and to predict the expected resolution at near field operation of the device. The prototype construction is the first step in the development of a Compton probe for prostate imaging.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2008.922817