Acquisition and processing methods for a bedside cardiac SPECT imaging system

Matthew T. Studenski, David R. Gilland, Alan Cebula

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We have developed a compact and mobile gamma imaging system that is designed for both PET and SPECT acquisitions within a bedside environment, such as an intensive care unit, surgical suite, or emergency room. This paper describes the SPECT performance evaluation of the system for cardiac imaging, including both Tc-99m and F-18 radionuclides. For cardiac F-18 imaging in a bedside environment, the 511 keV SPECT approach using high energy collimation and anterior 180 degree acquisition has the advantages of not requiring a detector to be positioned beneath the bed and greatly reducing attenuation effects. In this study, we evaluated SPECT reconstructed image quality using an anthropomorphic dynamic cardiac phantom filled with Tc-99m and F-18 separately. The specific issues that were addressed in this study included the following: 1) mitigating septal penetration effects with the 511 keV photons using de-convolution filtering, (2) reducing truncation effects due to the relatively small field-of-view of the camera using angle-dependent center-of-rotation shifts, and 3) investigating the effects of reduced angular sampling and angular range. We found that reducing angular sampling to 28 projections through 135 degrees with Tc-99m and 25 projections through 180 degrees with F-18 showed all features of the myocardium.

Original languageEnglish (US)
Article number5409999
Pages (from-to)206-213
Number of pages8
JournalIEEE Transactions on Nuclear Science
Volume57
Issue number1 PART 1
DOIs
StatePublished - Feb 1 2010
Externally publishedYes

Keywords

  • Cardiac imaging
  • Image processing
  • Mobile Pet
  • Mobile SPECT

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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