Quantum Noise Analysis Of The Single Grating Aperture Gamma Ray Imaging

C Chou; S P. Chang; L S Chen

doi:10.1117/12.939369

15 June 1984 Quantum Noise Analysis Of The Single Grating Aperture Gamma Ray Imaging

C Chou, S P. Chang, L S Chen

Proceedings Volume 0454, Application of Optical Instrumentation in Medicine XII; (1984) https://doi.org/10.1117/12.939369
Event: Application of Optical Instrumentation in Medicine XII, 1984, San Diego, United States

Abstract

Single Grating Aperture (SAG), behaves as a variable frequency grating, records the object spectrum directly in Fourier domain where the quantum noise is introduced in this region originally. This is in contrast to a stationary coded aperture in which the noise appears in space domain in the shadow casting images. The noise properties of SGA imaging system with summation filtered back projection reconstruction algorithm has been derived. The calculation on SNR shows that this imaging system gives the image performance directly proportional to the intensity distribution of the object. The computer simulations of point and uniform disc object show this conclusion correct.

Citation Download Citation

C Chou, S P. Chang, and L S Chen "Quantum Noise Analysis Of The Single Grating Aperture Gamma Ray Imaging", Proc. SPIE 0454, Application of Optical Instrumentation in Medicine XII, (15 June 1984); https://doi.org/10.1117/12.939369

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