NDLI: A new compact gamma camera with super resolution capability and high sensitivity for monitoring sparse radioactive sources in large area

Content Provider	IEEE Xplore Digital Library
Author	Si Chen Tianyu Ma Feng He Yaqiang Liu Shi Wang
Copyright Year	2013
Description	Author affiliation: Key Lab. of Particle & Radiat. Imaging, Tsinghua Univ., Beijing, China (Si Chen; Tianyu Ma; Yaqiang Liu; Shi Wang) \|\| Beijing NucMed Technol. Ltd., Beijing, China (Feng He)
Abstract	A new compact gamma camera was developed to detect and image gamma-emitting radioactive sources in large area. The gamma camera consists of a tungsten coded-aperture collimator, a pixellated NaI(Tl) scintillator, a multi-anode photo multiplier tube(PMT) and dedicated electronics for gamma photon detection and data acquisition. Two statistical iterative image reconstruction algorithms were implemented to improve the spatial resolution and sensitivity for gamma imaging. The gamma camera is a core module of RLS-1000A, a commercially available device also including a video camera and other supporting modules. RLS-1000A is capable of simultaneous gamma and visible-light imaging of a field of view (FOV) up to 30° in a two dimensional angular plane. In this case, the gamma and visible-light images are spatially and temporally registered by software. The fused images are displayed for real-time visualization of radiation intensity field and further localization of radioactive sources in the FOV. Experiments for evaluating the performances of RLS-1000A demonstrated that the angular resolution of gamma imaging achieved 1° for $^{60}Co$ point sources. A $^{99m}Tc$ point source inducing a dose rate of 40nGy/h at the front face of gamma camera was imaged and localized correctly. Experiments also showed that RLS-1000A has the capability of real-time detecting, identifying and tracking pedestrians taking medical radioisotopes of as low as ~5-10 mCi in a carry-on bag.
Starting Page	1
Ending Page	4
File Size	575398
Page Count	4
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829418
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Photonics Image reconstruction Spatial resolution Collimators real-time imaging gamma camera super resolution coded-aperture
Content Type	Text
Resource Type	Article

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