Using the valuable donations we have received, our hospital will install a high-precision radiation therapy device (linac) in our radiation therapy center from January 2025.OXRAY®We have introduced the following.

Using this cutting-edge equipment, we performed the world's first dynamic tracking intensity-modulated arc therapy (Dynamic SwingArc®) on a liver tumor from November 12th to November 18th, 2025 (a technology that irradiates from multiple directions, including non-coplanar areas, hereafter referred to as DSA).

Kyoto University was the first in the world to perform dynamic tumor tracking intensity modulated arc therapy using OXRAY® in March 2025, and our hospital is the second institution to do so. However, this is the first time in the world that it has been combined with DSA.

Benefits of combining the two radiation therapies

In radiation therapy, it is necessary to irradiate the lesion with a high dose while minimizing the dose to normal tissue (i.e., obtaining a good dose distribution). OXRAY® is capable of highly accurate irradiation based on a position prediction model for tumors that move with respiration (such as lung tumors and liver tumors). By combining it with DSA,

• It is now possible to select a more ideal irradiation trajectory than before, resulting in a better dose distribution.
• This shortens the irradiation time, which reduces the physical burden on the person receiving treatment.

Possibilities include: The application of OXRAY® to patients who have previously been difficult to treat may be expanded, and further clinical applications are expected in the future.

(Related information)

April 2, 2025: Kyoto University Hospital announces "World's first clinical trial of OXRAY® dynamic tracking intensity-modulated arc therapy"