Improvements in medical CT image reconstruction accuracy in the presence of metal objects by using X-rays up to 1 MeV

James Clayton, Gary Virshup, Ming Yang, Radhe Mohan, Lei Dong

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

1 Scopus citations

Abstract

The use of flat panels based on amorphous silicon technology (a-Si) for digital radiography has been accepted by the medical community as having advantages over film-based systems. Radiation treatment planning employs computed tomographic (CT) data sets and projection images to delineate tumor targets and normal structures that are to be spared from radiation treatment. The accuracy of CT numbers is crucial for radiotherapy dose calculations in general but is even more important for charged particle therapy. Conventional CT scanners operating at kilovoltage X-ray energies typically exhibit significant image reconstruction artifacts in the presence of metal implants in human body. We demonstrate a significant improvement in metal artifact reductions and electron density measurements using an amorphous silicon a-Si imager obtained with an X-ray source that can operate at energies up to 1 MeV. The data collected with the higher energy system will be compared and contrasted to CT results obtained at standard kilovoltage energies.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7295
DOIs
Publication statusPublished - 2009
EventHealth Monitoring of Structural and Biological Systems 2009 - San Diego, CA, United States
Duration: Mar 9 2009Mar 12 2009

Other

OtherHealth Monitoring of Structural and Biological Systems 2009
CountryUnited States
CitySan Diego, CA
Period3/9/093/12/09

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Keywords

  • Amorphous silicon
  • Computed tomography cone beam computed tomography
  • Digital radiography
  • Linear accelerator
  • X-ray imaging
  • X-ray tube

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Clayton, J., Virshup, G., Yang, M., Mohan, R., & Dong, L. (2009). Improvements in medical CT image reconstruction accuracy in the presence of metal objects by using X-rays up to 1 MeV. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7295). [72951P] https://doi.org/10.1117/12.817401