Special collimators used in imaging systems play an important part in obtaining qualified
images to improve diagnosis in medicine. Methods: The primary aim of this study was to …

With regard to the different requirements, various collimators are widely employed within
nuclear medicine systems in order to evaluate the metabolism of organs as well as improve …

Fan-beam collimators offer a good balance between resolution and noise. The collimator
response may be included in iterative reconstruction algorithms in order to improve single …

The aims of this study were (a) to determine the true focal length of a fan-beam collimator
and (b) to calibrate image size (mm/pixel) for each collimator to permit inter-comparison of …

Objective This study investigates modulation transfer function (MTF) in parallel beam (PB)
and fan beam (FB) collimators using the Monte Carlo method with full width at half maximum …

The quantitative analysis of single-photon emission computed tomography data requires an
accurate determination of the collimator point spread function (PSF). The aim of this paper is …

One type of SPECT system often used for simultaneous emissiontransmission tomography
isequipped with parallel-hole collimators, moving line sources (MLS) and electronic …

Iterative reconstruction algorithms require modeling of the point spread function (PSF) of the
collimator in order to correct the loss of resolution in single photon emission computed …

Objective In addition to the trade-off between resolution and sensitivity which is a common
problem among all types of parallel hole collimators (PCs), obtained images by high energy …

This paper describes the methodology to design and conduct the performances of a fan
beam collimator. This fan beam collimator was designed to use with a multi-modality small …