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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Guobao Wang Jinyi Qi |
| Copyright Year | 2008 |
| Description | Author affiliation: Dept. of Biomed. Eng., Univ. of California, Davis, CA (Guobao Wang; Jinyi Qi) |
| Abstract | Muon tomography is a novel imaging technique that uses background cosmic radiation to inspect cargo containers for detecting the transportation or smuggling of heavy nuclear materials. Empirically, muon scattering data are modeled as zero-mean Gaussian random variables with variance being a function of the atom number and density of the scattering material. However, a single Gaussian distribution cannot model the tail of the true distribution and hence results in inaccuracy in the reconstructed images. In this paper, we propose a Gaussian scale mixture (GSM) to approximate the true distribution of muon data. The GSM follows the true distribution more closely than a single Gaussian model. We have derived a maximum likelihood reconstruction algorithm using the optimization transfer principle. Receiver operating characteristics (ROC) studies were performed using computer simulated data to evaluate the new algorithm. The results show that the use of GSM improves the detection performance significantly over that of the traditional Gaussian model. |
| Starting Page | 2948 |
| Ending Page | 2951 |
| File Size | 406842 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424417650 |
| ISSN | 15224880 |
| DOI | 10.1109/ICIP.2008.4712413 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-10-12 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Image reconstruction Mesons Tomography GSM Scattering Containers Radiation detectors Road transportation Random variables Atomic measurements muon tomography Gaussian scalemixture |
| Content Type | Text |
| Resource Type | Article |
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