Complete scheme for beam hardening correction in small animal computed tomography

C. De Molina, A. Sisniega, J. J. Vaquero, M. Desco, M. Abella

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

Abstract

CT images are often affected by beam hardening artifacts due to the polyenergetic nature of the X-ray beam. Several correction methods have been proposed to be included in an FDK reconstruction scheme, which is still the prefered reconstruction algorithm in commercial X-ray CT scanners. In this work, we present a complete correction scheme for beam hardening artifact correction in an FDK-based reconstruction scenario that accounts for both cupping artifact and dark streaks. The proposed method substitutes the need of the knowledge of the spectrum by empirical measurements and two parameters. It includes two steps: a linearization step of projection data and a post-reconstruction step. Evaluation done in real studies acquired with a cone-beam micro-CT scanner showed an average cupping reduction of 80 % in homogeneous phantoms and 72% in rodent studies. The correction scheme can be incorporated easily in any cone beam micro-CT scanner.

Original languageEnglish (US)
Title of host publication2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
Pages3835-3838
Number of pages4
DOIs
StatePublished - 2012
Externally publishedYes
Event2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012 - Anaheim, CA, United States
Duration: Oct 29 2012Nov 3 2012

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Other

Other2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
Country/TerritoryUnited States
CityAnaheim, CA
Period10/29/1211/3/12

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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