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Proceedings Paper

From the finite-length line-spread function to the point-spread function
Author(s): William J. Sehnert
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Paper Abstract

The point-spread function (PSF) of a circularly symmetric imaging system is commonly inferred from the line-spread function (LSF), which is the image of a line source whose length must be larger than the spatial extent of the PSF. This constraint on the minimum length of the line source makes it impossible to measure the LSF of a system whose PSF is large in extent relative to the size of the system's isoplanatic patch. This impasse motivates one to consider the problem of inferring the PSF from the finite-length line spread function (FLSF), which is the image of a finite-length line source of arbitrary, but fixed, length. Formulas for calculating the PSF from the FLSF have been developed, but the numerical implementation of these formulas are either time consuming or unstable. In this presentation, we derive a formula for performing the FLSF-PSF conversion which is better suited for numerical purposes.

Paper Details

Date Published: 8 May 1995
PDF: 13 pages
Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208370
Show Author Affiliations
William J. Sehnert, Health Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 2432:
Medical Imaging 1995: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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