Luminescence of water was measured by a cooled charge-coupled device (CCD) camera during pencil-beam and uniform-field proton irradiation with energy lower than the Cherenkov-light threshold . The range and field width could be almost estimated from the luminescence images. The luminescence image, therefore, has the potential to three-dimensional dose estimation for proton therapy. However, parallax error decreased the inclination of the distal and lateral fall-off of the uniform field. For this purpose, imaging was conducted with the different distance between the CCD camera and a...
Description of activity and work performed
Setup for luminescence imaging
The measurement was conducted in the spot-scanning treatment room at Nagoya Proton Therapy Center . Figure 1 shows the experimental setup for luminescence imaging. The CCD camera was located 40 or 80 cm far from the water phantom to image the luminescence of water. Two types of lenses with a focal length of 8 and 12 mm were used for measurement at 40 and 80 cm distance, respectively. The images were measured during the irradiations of the uniform field at 12...
Conclusion and recommendations
The luminescence image could be measured at 80 cm far from the water phantom in spite of the week intensity of the luminescence. Increasing the distance between the CCD camera and water phantom was effective in improving the parallax error.
M. Komori, PhD
Department of Radiological Sciences, Nagoya University Graduate School of Medicine
1-1-20 Daiko-Minami, Higashi-ku
email: [email protected]
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Komori M, Sekihara E, Yabe T, Horita R, Toshito T, Yamamoto S (2018) Luminescence imaging of water during uniform-field irradiation by spot scanning proton beams. Phys. Med. Biol. 63 11NT01
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