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Literature DB >> 19218734

The geometric response function for convergent slit-slat collimators.

Yusheng Li¹, James Oldendick, Caesar E Ordonez, Wei Chang.

Abstract

We have derived an analytic geometric transfer function (GTF) for a convergent slit-slat collimator that treats the parallel slit-slat collimator as a special case. The effective point spread function (EPSF) is then derived from the GTF through the Fourier transform. The results of these derivations give an accurate description of the complete geometric response for a slit-slat collimator that includes the effects of the shape and orientation of the slit and slats. We have also derived exact and approximate sensitivity formulae and spatial resolution formulae using the EPSF.

Entities: Chemical Disease Species

Mesh：

Year: 2009 PMID： 19218734 PMCID： PMC3699207 DOI： 10.1088/0031-9155/54/6/006

Source DB: PubMed Journal: Phys Med Biol ISSN： 0031-9155 Impact factor: 3.609

12 in total

The geometric response function for convergent slit-slat collimators.

Review 1. Review of convergent beam tomography in single photon emission computed tomography.

2. On-axis sensitivity and resolution of a slit-slat collimator.

3. Fourier correction for spatially variant collimator blurring in SPECT.

4. Verification of the sensitivity and resolution dependence on the incidence angle for slit-slat collimation.

5. SPRINT: A Stationary Detector Single Photon Ring Tomograph for Brain Imaging.

6. SPRINT II: a second generation single photon ring tomograph.

7. The geometric transfer function for cone and fan beam collimators.

8. Derivation and validation of a sensitivity formula for slit-slat collimation.

9. Improved estimation of the detector response function for converging beam collimators.

10. Compensation of spatial system response in SPECT with conjugate gradient reconstruction technique.

1. Analytic derivation of pinhole collimation sensitivity for a general source model using spherical harmonics.

2. Slit-Slat and Multislit-Slat Collimator Design and Experimentally Acquired Phantom Images from a Rotating Prototype.

3. LOR-interleaving image reconstruction for PET imaging with fractional-crystal collimation.

4. Fourier rebinning and consistency equations for time-of-flight PET planograms.

5. Finding Optimized Conditions of Slit-Slat and Multislit-Slat Collimation for Breast Imaging.