NDLI: Noninvasive method for determining the three-dimensional density distribution in an inspected object employing modulation of compton-scattered gamma signals

Content Provider	IEEE Xplore Digital Library
Author	Kondic, N. Jupiter, C.
Copyright Year	2010
Description	Author affiliation: JUPITER Corporation, Wheaton, MD 20902 USA (Kondic, N.; Jupiter, C.)
Abstract	A noninvasive measurement of the three-dimensional density distribution within an object is accomplished using a spectrometer to detect Compton-scattered photons from the inspected object that is irradiated by mono-energetic gammas from an isotopic source. This analysis describes the use of sets of virtual isogonic arcs and shells that, based on the Compton Scattering Law, represent the loci of scattering points having a common value of energy of scattered gammas-and that engulf the inspected object. A single-frequency electronic modulation on the voltage set points for each of the multi-channel analyzer energy bins allows modulation of these virtual isogonic surfaces within the inspected object to encode the scattered gamma flux from each voxel. Decoding of the detected gamma data is accomplished by multiplying it by electronic signals having frequencies identical to the voxel modulation frequencies. This is followed by integration and solution of a set of linear algebraic equations to produce an image of the density field.
Starting Page	70
Ending Page	79
File Size	1006484
Page Count	10
File Format	PDF
ISBN	9781424491063
ISSN	10957863
e-ISBN	9781424491056
DOI	10.1109/NSSMIC.2010.5873719
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Scattering Strips Modulation Photonics Detectors Inspection Indexes
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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