A. PET Simulation
MATLAB (The Mathworks, Inc.) was used to simulate
PET image reconstruction. The MATLAB built in function,
”phantom.m”, was used to generate a head phantom to be
used as original “true” image. The effects of scattering and
random coincidences were simulated by adding Gaussian
and/or Poison noise onto the original image. The sinogram of
the image was generated using the function ‘radon.m’ which
returns the Radon transform of an intensity image for an
angle entered by the user. The filtered backprojection
algorithm was implemented by using the function ‘iradon.m’
which reconstructs the image using different built in filters of
MATLAB specified by the user.