A multi-scanner evaluation of PET image quality using phantom studies

Suleman Surti, Ramsey D Badawi, Clay H. Holdsworth, Georges E. El Fakhri, Paul E. Kinahan, Joel S. Karp

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Scopus citations

Abstract

We present preliminary results from an investigation of the impact of phantom diameter on sinogram and image quality for two PET scanners, the Allegro and ECAT HR +, both operated in fully-3D acquisition mode. Here, we evaluate the global sinogram NEC measurement and in subsequent studies will be looking at a local image signal-to-noise ratio (SNR) estimate derived from a non-prewhitening matched filter observer (SNR NPW). We evaluate two different metrics, the global sinogram NEC measurement and a local image signal-to-noise (SNR) estimate derived from non-prewhitening matched filter observer (SNR NPW). There is a significant decrease in the NEC rates when going from small to large diameter phantoms. As the diameter of the tissue-equivalent attenuating cylinder increases from 20 cm to 35 cm, the peak NEC rate drops by a factor of six for the Allegro scanner. If √NEC is an accurate measure of image quality, we expect to see a corresponding degradation in detection specific tasks, such as the SNR NPW for a non-prewhitening matched filter.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
EditorsS.D. Metzler
Pages2425-2427
Number of pages3
Volume4
StatePublished - 2003
Externally publishedYes
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003

Other

Other2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference
CountryUnited States
CityPortland, OR
Period10/19/0310/25/03

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

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