Evaluation of few-view reconstruction parameters for illicit substance detection using fast-neutron transmission spectroscopy

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:196586

Fink, C L; Humm, P G; Micklich, B J

We have evaluated the performance of the Maximum Likelihood algebraic reconstruction algorithm for the case of a few projections and for relatively coarse projection and pixel resolution. Ibis evaluation was done using receiver operator curves obtained from the fast neutron transmission spectroscopy system operated in a mode to detect explosives in luggage. The results show that increasing the number of projection angles is more important than increasing the projection resolution, the reconstructed pixel resolution, or the number of iterations in the Maximum Likelihood algorithm. A 100% detection efficiency with essentially no false positives is possible for a square block of RDX explosive, a projection resolution of 2 cm, a reconstructed pixel size of 2 {times} 2 cm, and five projection angles. For rectangular shaped explosives more angles are required obtain the same system performance.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: Federal Aviation Administration, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 196586
• Report Number(s): ANL/TD/CP--86192; CONF-951073--18; ON: DE96005005; CNN: DTFA03-03-X-0021
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
BENCH-SCALE EXPERIMENTS
CONTAINERS
DETECTION
DRUGS
EXPLOSIVES
FAST NEUTRONS
NONDESTRUCTIVE ANALYSIS