The Radiation Oncology Center provides outpatient care services for those who have received or are receiving radiation therapy based on close cooperation with the Radiation Therapy Center including Department of Radiation Oncology, the Intensity-Modulated Radiation Therapy Center and the High Precision Radiation Therapy Center. 

Based on its experience with the radiation therapy of diverse types of rare cancer including frequently occurring types of cancer, the center provides the best radiation therapy tailored to individual patients through close and systematic cooperative consultation with other centers in the Cancer Hospital.

While ionizing radiation such as X-ray and electron ray, which are used in radiation therapy, is employed usefully in the treatment of malignant tumors and certain benign tumors, it can cause considerable side effects such as the development of secondary cancer and tissue necrosis when used incorrectly. 

Consequently, radiation therapy must be performed under the responsibility of radiation oncology specialists who have been properly educated in and accumulated adequate experience with not only clinical radiation oncology but also radiation biology and radiation physics. 

Furthermore, well-educated medical physicists are indispensable 

By nature, devices take up an important share of radiation therapy. 

In addition to replacing two radiation therapy devices with the latest models in 2010, the center started the operation of one latest radiation therapy device capable of multi-purpose image-guided stereotactic body radiation therapy (SBRT) in August 2012 and of Truebeam, a state-of-the-art device, in September, thus making it possible to treat 300 or more patients per day with a total of six linear accelerators (LINAC). 

Consequently, with high-dose rate brachytherapy, which locally concentrates radiation and minimizes radiation on the surrounding normal tissues, faster and more accurate radiation therapy is expected to be possible.

In addition, the center continues to present the fruits of its research on basic fields in not only clinical radiation oncology but also radiation biology and radiation physics in famous academic journals and at conferences at home and abroad and will increase cancer treatment rates using radiation therapy and contribute to the improvement of the quality of life of patients who have completely recovered from cancer through continued research.