The FIRST Program is a major research support structure established as part of a Japanese government initiative to promote science and technology. At a meeting of the Council for Science and Technology Policy in March 2010, out of a total of 565 applications from across Japan, 30 “Core Researchers and Projects” were awarded grants based on their notable potential in the advancement of Japanese science and technology. Hokkaido University’s “Advanced Radiation Therapy Project Real-time Tumor-tracking with Molecular Imaging Technique” project was awarded a FIRST grant following an application by Professor Hiroki Shirato of the Department of Radiation Medicine, Graduate School of Medicine*. This was the only application accepted in the field of radiation therapy. The proposed system has gained worldwide attention as a potential driving force behind the advancement of radiation treatment and cancer therapy.
The goal of “Advanced Radiation Therapy Project Real-time Tumor-tracking with Molecular Imaging Technique” is to develop a treatment system that can dramatically reduce the irradiation of normal tissue, in a compact, low-cost system that demonstrates international competitiveness. This goal is achieved by combining the Real-time Tumor -tracking.
Radiation Therapy developed by Hokkaido University through X-ray therapy with Hitachi’s spot scanning proton beam irradiation technology, which was delivered for the first time ever to a general hospital. In this way, Hokkaido University and Hitachi will offer a proton beam therapy system that can accurately irradiate a tumor that moves due to respiration, for example in the lung and liver.
At the recently completed facility, using the compact PROBEAT-RT Proton Beam Therapy System created through joint development activities, Hokkaido University will first provide treatment using spot scanning irradiation technology from Hitachi, while at the same time striving to quickly develop a treatment system that incorporates its own moving tumor tracking irradiation technology. Hitachi has already applied for approval for manufacture and sales of the treatment system combining spot scanning irradiation and Real-time Tumor-tracking Radiation Therapy, and hopes to receive approval and begin treatments in the first half of FY 2014.
The PROBEAT-RT Proton Beam Therapy System is a compact, low-cost proton beam cancer treatment system developed jointly by Hokkaido University and Hitachi. By merging Hitachi’s technologies with the expertise that Hokkaido University has developed through radiation treatment, and by using only spot scanning irradiation as the irradiation method, it became possible to reduce the size of the gantry, the irradiation nozzle, and the accelerator. In this approach, they have created a treatment system that is easy to use and more compact overall, and which demonstrates outstanding international competitiveness. In comparison to the PROBEAT-III Proton Beam Therapy System, which was released previously by Hitachi, the circumference of the accelerator has been reduced to 18 m from the original 23 m, while the gantry, which had a maximum external length of 11 m and an internal diameter of 3.5 m, has been reduced in size to a maximum external length of 9 m and an internal diameter of 2.5 m. The installation area required for the system as a whole has been reduced by approximately 30 percent.
Hokkaido University and Hitachi will combine their respective outstanding technologies, knowledge, and experience in the medical and engineering fields, to contribute to cutting-edge radiation therapy and cancer treatments that maintain excellent quality of life (QOL) for patients through the development of this Proton Beam Therapy System.
