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Proceedings Paper

Evaluation of image gating as an approach for noise estimation and optimisation of SPECT images
Author(s): Khalid Alzimami; Salem Sassi; Abduallah Alshehri; Nicholas Spyrou; Alan Britten
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Paper Abstract

This study aims to evaluate the potential for using image gating techniques for accurate estimating random noise in clinical SPECT images. Phantom and patient bone SPECT scans were acquired in a gated mode using standard acquisition protocols with a dummy electronic trigger. The acquired projection data was divided into time slots and reconstructed using the same algorithm to produce independent sets of data. Our results showed that this method can be used for accurate estimation of the level of random noise in phantom and clinical SPECT studies, and it avoids the problem of pixel value correlation faced when using small ROI in estimating noise in SPECT images.

Paper Details

Date Published: 16 March 2011
PDF: 8 pages
Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 796148 (16 March 2011); doi: 10.1117/12.877992
Show Author Affiliations
Khalid Alzimami, King Saud Univ. (Saudi Arabia)
Univ. of Surrey (United Kingdom)
Salem Sassi, Royal Marsden Hospital NHS Foundation Trust (United Kingdom)
Abduallah Alshehri, Riyadh Military Hospital (Saudi Arabia)
Nicholas Spyrou, Univ. of Surrey (United Kingdom)
King Saud Univ. (Saudi Arabia)
Alan Britten, St. George's Hospital (United Kingdom)


Published in SPIE Proceedings Vol. 7961:
Medical Imaging 2011: Physics of Medical Imaging
Norbert J. Pelc; Ehsan Samei; Robert M. Nishikawa, Editor(s)

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