TY - GEN
T1 - Feasible study on energy subtraction X-ray CT technique using comb-shape filtered X-rays
AU - Tsubouchi, Toshiro
AU - Watanabe, Kenichi
AU - Yamazaki, Atsushi
AU - Uritani, Akira
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84858676385&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858676385&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2011.6154495
DO - 10.1109/NSSMIC.2011.6154495
M3 - Conference contribution
AN - SCOPUS:84858676385
SN - 9781467301183
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 271
EP - 274
BT - 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
Y2 - 23 October 2011 through 29 October 2011
ER -