Gamma-ray imaging using a Fresnel zone plate aperture, multiwire proportional chamber detector, and computer reconstruction
Conference
·
OSTI ID:4329303
The use of the multiwire proportional chamber in a Fresnel zone plate coded aperture gamma-ray imaging system is described. Image reconstruction is by computer using the fast Fourier transform algorithm. Criteria for design parameters of the imaging system are established. A calculation of the signal/ noise ratio of images reconstructed from computer-generated on-axis zone plate holograms gives values, for larger numbers of gamma-ray events, which are somewhat smaller than theoretical values based on a shot-noise formula. The use of a and a negative zone plate combination is shown to eliminate it large backgrouud usually associated with on-axis zone plate imaging. (auth)
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-29-020913
- OSTI ID:
- 4329303
- Report Number(s):
- LBL-2048; CONF-731112-27
- Resource Relation:
- Conference: Nuclear science symposium, San Francisco, California, USA, 14 Nov 1973; Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- United States
- Language:
- English
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