3-D reconstruction in PET cameras with irregular sampling and depth of interaction

P. R G Virador, W. W. Moses, R. H. Huesman, J. Qi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present three-dimensional (3-D) reconstruction algorithms that address fully 3-D tomographic reconstruction for a septa-less, stationary, and rectangular camera. The field of view (FOV) encompasses the entire volume enclosed by detector modules capable of measuring depth of interaction (DOI). The filtered backprojection-based algorithms incorporate DOI, accommodate irregular sampling, and minimize interpolation in the data by defining lines of response between the measured interaction points. We use fixed-width, evenly spaced radial bins in order to use the fast Fourier transform but use irregular angular sampling to minimize the number of unnormalizable zero efficiency sinogram bins. To address persisting low-efficiency bins, we perform two-dimensional (2-D) nearest neighbor radial smoothing, employ a semi-iterative procedure to estimate the unsampled data, and mash the "in plane" and the first oblique projections to reconstruct the 2-D image in the 3DRP algorithm. We present artifact-free, essentially spatially isotropic images of Monte Carlo data with full-width at half-maximum resolutions of 1.5, 2.3, and 3.1 mm at the center, in the bulk, and in the corners of the FOV, respectively.

Original languageEnglish (US)
Pages (from-to)1524-1529
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume48
Issue number4 II
DOIs
StatePublished - Aug 2001
Externally publishedYes

Fingerprint

Bins
Cameras
sampling
cameras
Sampling
field of view
septum
interactions
Full width at half maximum
smoothing
Fast Fourier transforms
interpolation
artifacts
Interpolation
modules
projection
Detectors
detectors
estimates

Keywords

  • Filtered backprojection
  • Positron emission tomography (PET)
  • Reconstruction algorithms

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

3-D reconstruction in PET cameras with irregular sampling and depth of interaction. / Virador, P. R G; Moses, W. W.; Huesman, R. H.; Qi, J.

In: IEEE Transactions on Nuclear Science, Vol. 48, No. 4 II, 08.2001, p. 1524-1529.

Research output: Contribution to journalArticle

Virador, P. R G ; Moses, W. W. ; Huesman, R. H. ; Qi, J. / 3-D reconstruction in PET cameras with irregular sampling and depth of interaction. In: IEEE Transactions on Nuclear Science. 2001 ; Vol. 48, No. 4 II. pp. 1524-1529.
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