Abstract
To improve the performance of optical computed tomography (OpCT) reconstruction
in the case of limited projection views, maximum entropy (ME) algorithms were
proposed and can achieve better results than traditional ones. However, in
the discrete iterative process of ME, the variables of the iterative function
are continuous. Hence, interpolation methods ought to be used to improve the
precision of the iterative function values. Here, a ${\rm sinc}$ function interpolation approach was adopted in ME algorithm (SINCME)
and its reconstruction results for OpCT with limited views were studied using
four typical phantoms. Compared results with ME without interpolation, traditional
medical CT back-projection algorithm (BP), and iterative algorithm algebraic
reconstruction technique (ART) showed that the SINCME algorithm achieved the
best reconstruction results. In an experiment of emission spectral tomography
reconstruction, SINCME was also adopted to calculate the three-dimensional
distribution of physical parameters of a candle flame. The studies of both
algorithm and experiment demonstrated that SINCME met the demand of limited-view
OpCT reconstruction.
© 2009 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription