High-resolution restoration of diffuse optical images reconstructed by the photon average trajectories method

Alexander B. Konovalov; Vladimir V. Lyubimov

doi:10.1117/12.578354

20 August 2004 High-resolution restoration of diffuse optical images reconstructed by the photon average trajectories method

Alexander B. Konovalov, Vladimir V. Lyubimov

Author Affiliations +

Proceedings Volume 5474, Saratov Fall Meeting 2003: Optical Technologies in Biophysics and Medicine V; (2004) https://doi.org/10.1117/12.578354
Event: Saratov Fall Meeting 2003, 2003, Saratov, Russian Federation

Abstract

The possibility of improving the spatial resolution of diffuse optical images reconstructed by the photon average trajectories (PAT) method is substantiated. The PAT method recently presented by us is based on a concept of an average statistical trajectory for transfer of light energy, the photon average trajectory (PAT). The inverse problem of diffuse optical tomography (DOT) is reduced to solution of integral equation with integration along a conditional PAT. As a result the conventional algorithms of projection computed tomography can be used for fast reconstruction of diffuse optical images. In our recent works we have shown that the application of the backprojection algorithms with special filtration of shadows allows a 20%-gain in spatial resolution to be obtained. But the shortcoming of the backprojection algorithm is that they can not reconstruct accurately the object regions located close to the boundary. In the present paper we consider alternative approach to improve the spatial reconstruction, which may be applied to images reconstructed with the use of algebraic techniques. It is based on post-reconstruction restoration of images blurred due to averaging over spatial distributions of photons, which form the signal measured by the receiver. We suggest a spatially invariant blurring model to restore local regions of a diffuse image with the use of standard deconvolution algorithms. Two iterative non-linear algorithms: the maximum-likelihood algorithm and the Lucy-Richardson algorithm are considered. It is shown that both of them allow the spatial resolution to be improved. The effect of the improvement is identical to that obtained with the use of the backprojection algorithms.

Citation Download Citation

Alexander B. Konovalov and Vladimir V. Lyubimov "High-resolution restoration of diffuse optical images reconstructed by the photon average trajectories method", Proc. SPIE 5474, Saratov Fall Meeting 2003: Optical Technologies in Biophysics and Medicine V, (20 August 2004); https://doi.org/10.1117/12.578354

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
14 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Reconstruction algorithms

Acquisition tracking and pointing

Spatial resolution

Point spread functions

Lawrencium

Deconvolution

Inverse optics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years