A Postprocessing Method for Compensation of Scatter and Collimator Blurring in SPECT: A Proof-of-Concept Study
نویسندگان
چکیده
منابع مشابه
A postprocessing method for compensation of scatter and collimator blurring in SPECT: a proof-of-concept study.
UNLABELLED Attenuation, scatter, and blurring are 3 major contributors to SPECT image degradation. Image reconstruction without compensation for these degradations results in reduced contrast and reduced quantitative accuracy. In this proof-of-concept study, we present an efficient postprocessing method to compensate for the scatter and blurring effect in SPECT. METHODS A raw image is first r...
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15 صفحه اولScatter and Blurring Compensation in Inhomogeneous Media Using a Postprocessing Method
An efficient postprocessing method to compensate for the scattering and blurring effects in inhomogeneous medium in SPECT is proposed. A two-dimensional point spread function (2D-PSF) was estimated in the image domain to model the combination of these two physical effects. This 2D-PSF in the inhomogeneous medium is fitted with an asymmetric Gaussian function based on Monte Carlo simulation resu...
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Development of a collimator blurring compensation method using fine angular sampling projection data in SPECT.
Due to the collimator aperture, spatial resolution of SPECT data varies with source-to-detector distance. Since the radius of detector rotation is bigger when scanning larger patients, spatial resolution is degraded in these cases. Emitted gamma rays travel not only along the central axis of the collimator hole but also off-axis due to the collimator aperture. However, an off-axis ray at one an...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine Technology
سال: 2009
ISSN: 0091-4916
DOI: 10.2967/jnmt.108.061135