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Proceedings Paper

Effects of scattered x-rays on monoenergetic cone-beam 3D CT images
Author(s): Kohji Inoue; Hitoshi Kanamori; Chikao Uyama
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Paper Abstract

Scatter to primary radiation ratios at detector positions were calculated for spherical water phantoms in the cone-beam x-ray 3D CT scanner using the Monte Carlo simulation method. In the Monte Carlo simulation, 1 approximately 4 X 106 photons of cone-beamed several monoenergetic x-rays have been traced individually as these photons interact within the phantoms with diameters 10 and 15 cm. In case of the incident photon energies are 72.86 and 68.79 keV, photon spectra at the center of the planar detector system are depicted. The decrease in CT number due to scatter was found to be about 100. The scatter reduces CT numbers in the whole region of images and the intensity of scattered rays is nearly uniform, so that rounded-off image is reconstructed.

Paper Details

Date Published: 1 May 1994
PDF: 8 pages
Proc. SPIE 2163, Medical Imaging 1994: Physics of Medical Imaging, (1 May 1994); doi: 10.1117/12.174283
Show Author Affiliations
Kohji Inoue, Kyoto Institute of Technology (Japan)
Hitoshi Kanamori, Kyoto Institute of Technology (Japan)
Chikao Uyama, National Cardiovascular Ctr. (Japan)

Published in SPIE Proceedings Vol. 2163:
Medical Imaging 1994: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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