Improving PET Image Spatial Resolution by Experimental Measurement of Scanner Blurring Properties

E. De Bernardi, F. Zito, L. Michelutti, L. Mainardi, P. Gerundini, G. Baselli

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

Abstract

This paper presents a method for the improvement of transaxial spatial resolution in Positron Emission Tomography (PET) images in 2D acquisition mode. The method is based on the experimental measurement of the system blurring properties which are then inserted into an iterative reconstruction algorithm. In order to maintain acceptable the computation time, an Ordered Subset algorithm OSEM was used. The proposed algorithm was tested on different phantoms and on oncological patients. It showed good performances in terms of contrast improvement and partial volume recovery without increasing the image noise component. The application of the presented method is particularly important in whole body oncological studies, where there is the need to resolve small lesion which can be located at different distances from the scanner axis and in different blurring conditions.

Original languageEnglish
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
EditorsR.S. Leder
Pages975-977
Number of pages3
Volume1
Publication statusPublished - 2003
EventA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: Sep 17 2003Sep 21 2003

Other

OtherA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CountryMexico
CityCancun
Period9/17/039/21/03

Keywords

  • Contrast Recovery
  • Iterative Reconstruction Algorithm
  • PET
  • Spatial Resolution

ASJC Scopus subject areas

  • Bioengineering

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