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Imaging radiation dose in breast radiotherapy by X-ray CT calibration of Cherenkov light

Author

Listed:
  • R. L. Hachadorian

    (Dartmouth College)

  • P. Bruza

    (Dartmouth College)

  • M. Jermyn

    (Dartmouth College
    DoseOptics LLC)

  • D. J. Gladstone

    (Dartmouth College
    Geisel School of Medicine, Dartmouth College
    Norris Cotton Cancer Center at Dartmouth Hitchcock Medical Center)

  • B. W. Pogue

    (Dartmouth College
    DoseOptics LLC
    Geisel School of Medicine, Dartmouth College
    Norris Cotton Cancer Center at Dartmouth Hitchcock Medical Center)

  • L. A. Jarvis

    (Geisel School of Medicine, Dartmouth College
    Norris Cotton Cancer Center at Dartmouth Hitchcock Medical Center)

Abstract

Imaging Cherenkov emission during radiation therapy cancer treatments can provide a real-time, non-contact sampling of the entire dose field. The emitted Cherenkov signal generated is proportional to deposited dose, however, it is affected by attenuation from the intrinsic tissue optical properties of the patient, which in breast, ranges from primarily adipose to fibroglandular tissue. Patients being treated with whole-breast X-ray radiotherapy (n = 13) were imaged for 108 total fractions, to establish correction factors from the linear relationships between Cherenkov light and CT number (HU). This study elucidates this relationship in vivo, and a correction factor approach is used to scale each image to improve the linear correlation between Cherenkov emission intensity and dose ($$R_{6X}^2 = 0.85,\,R_{10X}^2 = 0.95$$R6X2=0.85,R10X2=0.95). This study provides a major step towards direct quantitative radiation dose imaging in humans by utilizing non-contact camera sensing of Cherenkov emission during the radiation therapy treatment.

Suggested Citation

  • R. L. Hachadorian & P. Bruza & M. Jermyn & D. J. Gladstone & B. W. Pogue & L. A. Jarvis, 2020. "Imaging radiation dose in breast radiotherapy by X-ray CT calibration of Cherenkov light," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16031-z
    DOI: 10.1038/s41467-020-16031-z
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