Feasible study on energy subtraction X-ray CT technique using comb-shape filtered X-rays

Toshiro Tsubouchi, Kenichi Watanabe, Atsushi Yamazaki, Akira Uritani

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

Abstract

X-ray CT can acquire high quality tomograms and can be used for various diagnoses including early detection of cancers. Utilizing the energy information of X-rays as the energy subtraction method is useful to improve the image contrast because each material has different energy dependences on interactions with X-ray. To utilize the energy information of X-rays, we attempt to use the filtered X-rays as X-ray sources with different energy spectra. Especially we propose utilizing a comb-shape filter placed between an X-ray source and an object to simultaneously acquire transmission images by filtered and unfiltered X-rays. In this paper, we study the feasibility of the proposed CT technique through simulations and basic experiments. The transmission images through a comb-shape filter have a striped structure. By estimating the X-ray intensities at intermediate points of discrete data points with the interpolation method, we can simultaneously acquire two transmission images obtained by filtered and unfiltered X-rays. From basic experiments imitating a comb-shape filter, we confirmed that the contrast of the images can be improved by applying the energy subtraction method using comb-shape filtered X-rays. In addition, we considered the spacing of a comb-shape filter through basic experiments.

Original languageEnglish
Title of host publication2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages271-274
Number of pages4
ISBN (Print)9781467301183
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011 - Valencia, Spain
Duration: Oct 23 2011Oct 29 2011

Publication series

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

Other

Other2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
Country/TerritorySpain
CityValencia
Period10/23/1110/29/11

All Science Journal Classification (ASJC) codes

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

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