Program Information
Luminescence Imaging of Water During Uniform-Field Irradiation by Spot Scanning Proton Beams
M Komori , S Yamamoto*, E Sekihara , T Toshito , Nagoya University Graduate School of Medicine, Nagoya, Aichi Prefecture
Presentations
WE-RAM3-GePD-JT-3 (Wednesday, August 2, 2017) 10:30 AM - 11:00 AM Room: Joint Imaging-Therapy ePoster Theater
Purpose: Luminescence was found during pencil-beam proton irradiation to water phantom and range could be estimated from the luminescence images. However it is not yet clear whether the luminescence imaging is applied to the distributed fields made of spot scanning proton beam irradiations. For this purpose, imaging was conducted for the uniform fields having spread out Bragg peak (SOBP) made by spot scanning proton beams.
Methods: We designed four types of the uniform fields with different ranges and irradiation fields. One of the designed fields was irradiated to water phantom and a cooled charge coupled device (CCD) camera was used to measure the luminescence images during irradiations. We estimated the ranges, field widths, and luminescence intensities from the luminescence images and compared those with the dose distribution calculated by a treatment planning system.
Results: For all types of uniform fields, we could obtain clear images of the luminescence showing the SOBPs. The ranges and field widths evaluated from the luminescence were consistent with those of the dose distribution calculated by a treatment planning system within ±1 mm and -4 mm, respectively. Luminescence intensities were proportional to the SOBP widths perpendicular to the beam direction.
Conclusion: The luminescence imaging could be applied to distributed fields made of spot scanning proton beam irradiations. Ranges and widths of the uniform fields with SOBP could be estimated from the images. The luminescence imaging is promising range and field width estimations in proton therapy.
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