Combining Radiography and Passive Measurements for Radiological Threat Detection in Cargo
Abstract Radiography is widely understood to provide information complimentary to passive detection: while not directly sensitive to radiological materials, radiography can reveal highly shielded regions which may mask a passive radiological signal. We present a method for combining radiographic and passive data which uses the radiograph to provide an estimate of scatter and attenuation for possible sources. This approach allows quantitative use of radiographic images without relying on image interpretation, and results in a probabilistic description of likely source locations and strengths. We present first results for this method for a simple modeled test case of a cargo container driving through a PVT portal. With this inversion approach, we address criteria for an integrated passive and radiographic screening system and how detection of SNM threats might be improved in such a system.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1113619
- Report Number(s):
- PNNL-SA-92137
- Resource Relation:
- Conference: IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2012), October 27-November 3, 2012, Anaheim, California, 657-661
- Country of Publication:
- United States
- Language:
- English
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