%0 Journal Article
%T Dual-Energy X-Ray Computed Tomography Scanner Using Two Different Energy-Selection Electronics and a Lutetium-Oxyorthosilicate Photomultiplier Detector
%A Osahiko Hagiwara
%A Eiichi Sato
%A Yasuyuki Oda
%A Satoshi Yamaguchi
%A Yuichi Sato
%A Hiroshi Matsukiyo
%A Toshiyuki Enomoto
%A Manabu Watanabe
%A Shinya Kusachi
%J International Journal of Medical Physics,Clinical Engineering and Radiation Oncology
%P 266-279
%@ 2168-5444
%D 2017
%I Scientific Research Publishing
%R 10.4236/ijmpcero.2017.63024
%X To obtain two kinds of tomograms at two different
X-ray energy ranges simultaneously, we have constructed a dual-energy X-ray
photon counter with a lutetium-oxyorthosilicate photomultiplier detector
system, thr</span><span style=\"font-family:Verdana;\">ee comparators, two
microcomputers, and two frequency-voltage converters. X-ray photons are
detected using the detector system, and the event pulses are input to three
comparators simultaneously to determine threshold energies. At a tube voltage
of 100 kV, the three threshold energies are 16, 35 and 52 keV, and two energy
ranges are 16</span></span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">-</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">35 and 52</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">-</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">100 keV. X-ray photons
in the two ranges are counted using microcomputers, and the logical pulses from
the two microcomputers are input to two frequency-voltage converters. In
dual-energy computed tomography (CT), the tube voltage and current were 100 kV
and 0.29 mA, respectively. Two tomograms were obtained simultaneously at two
energy ranges. The energy ranges for gadolinium-L-edge and K-edge CT were 16</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">-</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">35 and 52</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">-</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">100 keV, respectively.
The maximum count rate of dual-energy CT was 105 kilocounts per second with
energies ranging from 16 to 100 keV, and the exposure time for tomography was
19.6 min.
%K X-Ray Photon Counting
%K LSO-PMT Detector
%K Dual-Energy Counter
%K Energy-Dispersive CT
%K Gd-L-Edge CT
%K Gd-K-Edge CT
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=78049