Efficient computation of projections in iterative SPECT reconstruction

James J Hamill; Ronald E. Malmin

doi:10.1117/12.216879

18 August 1995 Efficient computation of projections in iterative SPECT reconstruction

James J Hamill, Ronald E. Malmin

Proceedings Volume 2622, Optical Engineering Midwest '95; (1995) https://doi.org/10.1117/12.216879
Event: Optical Engineering Midwest '95, 1995, Chicago, IL, United States

Abstract

In calculating projections for iterative SPECT, a particularly time consuming part of the calculation is convolution of the activity at each depth by the point-spread function, using FFTs. We find that space-based convolutions with a short-range kernel are equivalent and faster, if one uses the central limit theorem to generate a gaussian, depth-dependent point- spread function. This technique is applied to forward and backward projections.

Citation Download Citation

James J Hamill and Ronald E. Malmin "Efficient computation of projections in iterative SPECT reconstruction", Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); https://doi.org/10.1117/12.216879

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