Characterization of the Cherenkov scatter function for use in superficial dose measurement from external beam radiation treatments

Eric Brost; Yoichi Watanabe

doi:10.1117/12.2282869

13 February 2018 Characterization of the Cherenkov scatter function for use in superficial dose measurement from external beam radiation treatments

Eric Brost, Yoichi Watanabe

Author Affiliations +

Proceedings Volume 10492, Optical Interactions with Tissue and Cells XXIX; 104920M (2018) https://doi.org/10.1117/12.2282869
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Cherenkov light is created in clinical applications involving high-energy radiation such as in radiation therapy. Due to improvements in camera sensitivity, we are now able to detect and measure Cherenkov light created during radiation therapy using linear accelerators (linacs). However, no method currently exists for using Cherenkov light to estimate the absolute radiation dose delivered to irradiated tissues. We have developed a technique to perform dosimetry with images of Cherenkov emission using deconvolution imaging techniques. The deconvolution technique relies upon the Cherenkov Scatter Function (CSF), a function that describes the scattering of Cherenkov light as it is generated by the treatment photons and propagated through tissue to the surface of the skin. In this study, the CSF was generated through Monte Carlo for 6 MV, 10 MV, and 18 MV photon beams in light, medium, dark skin, and optical tissue phantom materials. Functional dependence of on incident treatment beam angle is shown. The CSFs generated are parameterized using a double-Gaussian distribution and fit coefficients are given. Basic formulation of the deconvolution imaging equation is given to show the relationship of the CSF to x-ray beam flux.

Conference Presentation

Citation Download Citation

Eric Brost and Yoichi Watanabe "Characterization of the Cherenkov scatter function for use in superficial dose measurement from external beam radiation treatments", Proc. SPIE 10492, Optical Interactions with Tissue and Cells XXIX, 104920M (13 February 2018); https://doi.org/10.1117/12.2282869

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