Optimal x-ray imaging geometry for flat-panel cone-beam computed tomography

J. H. Siewerdsen, D. A. Jaffray

Research output: Contribution to journalConference articlepeer-review

Abstract

A theoretical method for identifying optimal x-ray imaging geometry is presented and applied to cone-beam CT (CBCT) using a flat-panel imager (FPI). The method includes the effects of x-ray source distribution, imaging task, x-ray scatter, and detective quantum efficiency (DQE) on the ICRU-recommended figure of merit for image quality -detectability index. Cascaded systems analysis for FPIs is extended to incorporate the effects of x-ray scatter directly into the DQE. For the FPI-CBCT prototype being implemented for image-guided radiotherapy of the prostate, optimal magnification is ∼1.4-1.6, depending primarily on the magnitude of the x-ray scatter fraction.

Original languageEnglish (US)
Pages (from-to)106-107
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume1
StatePublished - Dec 1 2000
Externally publishedYes
Event22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, United States
Duration: Jul 23 2000Jul 28 2000

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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