Design of the Beam Line Elements for Proton Computed Tomography

Ryu, Hokyoung; Choi, Boyeol; Lee, Jaiki; Kim, Jong-Won

doi:10.3938/jkps.50.1489

Cited by 2 publications

(1 citation statement)

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“…To shift the incident beam energy in the IC measurement, an energy degrader made of two acryl wedges as shown in figure 1 was used. A Monte Carlo code MCNPX with a LA150h proton library (Waters 2002) was then used to calculate Bragg curves of a beam degraded by each stack of the wheel sequentially down to a few MeV (Ryu et al 2007). Angular span of each stack of the wheel was determined by least-squares fitting to the reference depth-dose curves that we chose.…”

Section: Methodsmentioning

confidence: 99%

Design, Fabrication, and Characterization of Tunable Micromachined Filter with Double-Cavity Structure

Janto

Matsutani

Koyama

2006

Jpn. J. Appl. Phys.

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The image quality of proton radiography using the method of beam energy modulation was studied to look into its practical uses. Two different depth-dose distributions generated by modulation were applied to investigate their effects on the density and spatial resolutions of the radiographic image. A steeper slope was found to provide higher resolution for the matching thickness of a phantom. The image was taken on a scintillation screen, and the distance between the phantom and the screen was a sensitive parameter on the resolution. For a beam with a range of 1.2 cm in Lucite, high-resolution images were attainable in the whole range. The resolution of proton images for different kinds of phantoms was examined in comparison with x-ray images as well as images simulated by a Monte Carlo code MCNPX. For a longer range of 18 cm, images attained by simulations indicated that density resolution is better maintained compared to spatial resolution, which is deteriorated by multiple Coulomb scattering.

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Section: Methodsmentioning

confidence: 99%