Effects of scattered x-rays on monoenergetic cone-beam 3D CT images

Kohji Inoue; Hitoshi Kanamori; Chikao Uyama

doi:10.1117/12.174283

1 May 1994 Effects of scattered x-rays on monoenergetic cone-beam 3D CT images

Kohji Inoue, Hitoshi Kanamori, Chikao Uyama

Proceedings Volume 2163, Medical Imaging 1994: Physics of Medical Imaging; (1994) https://doi.org/10.1117/12.174283
Event: Medical Imaging 1994, 1994, Newport Beach, CA, United States

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.

Citation Download Citation

Kohji Inoue, Hitoshi Kanamori, and Chikao Uyama "Effects of scattered x-rays on monoenergetic cone-beam 3D CT images", Proc. SPIE 2163, Medical Imaging 1994: Physics of Medical Imaging, (1 May 1994); https://doi.org/10.1117/12.174283

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available