@inproceedings{a752eb1ecc814f3eb1516e3a678bf444,
title = "Sampling considerations and resolution enhancement in ideal planar coded aperture nuclear medicine imaging",
abstract = "Coded apertures have an advantage over collimators in nuclear medicine diagnostics, in that under certain conditions there is no trade-off between the resolution and the efficiency of a given system. A problem known as the {\textquoteleft}partial volume effect{\textquoteright} typically limits image resolution, and coded aperture sampling considerations show that the effect remains applicable to decoded coded aperture images. Finite sources or distributed objects, however, lessen the severity of the effect, and allow for the system resolution to be enhanced by decreasing the dimensions of the transparent coded aperture elements - without affecting the open fraction of the aperture material. Computer simulation results for idealised infinitely thin and completely opaque coded apertures are presented. Discrete point sources are simulated, and a two-dimensional digital Shepp- Logan phantom is used to test the proposed methodology. The results show that the resolution is enhanced, and that a rootmean- square error measurement decreases from 28% to 23%. Under the presence of increased point spread function blur, for a theoretical gamma camera having a sigma of 1.27 pixels, the same measurement decreases from 34% to 25%.",
keywords = "Coded apertures, Nuclear medicine imaging, Partial volume effect, Resolution enhancement, Sampling considerations",
author = "Starfield, {D. M.} and Rubin, {D. M.} and T. Marwala",
note = "Publisher Copyright: {\textcopyright} Springer-Verlag Berlin Heidelberg 2007.; 11th Mediterranean Conference on Medical and Biological Engineering and Computing, MEDICON 2007 ; Conference date: 26-06-2007 Through 30-06-2007",
year = "2007",
doi = "10.1007/978-3-540-73044-6_209",
language = "English",
isbn = "9783540730439",
series = "IFMBE Proceedings",
publisher = "Springer Verlag",
number = "1",
pages = "806--809",
editor = "Tomaz Jarm and Peter Kramar and Anze zupanic",
booktitle = "IFMBE Proceedings",
address = "Germany",
edition = "1",
}