Contact Makati Hospital for the nearest location available.
https://www.makatimed.net.ph/service/radiation-oncology/
As of 2016 there has been radiation treatments in the following Cities or areas- Clearly since than there are many more.
Southern Philippines Medical Center (Davao City), Cagayan Valley Medical Center (Tuguegarao City, Cagayan), Baguio General Hospital and Medical Center, Bicol Medical Center (Naga City, Camarines Sur), Zamboanga City Medical Center, Lung Center of the Philippines (Quezon City), and Vicente Sotto Memorial Medical Center (Cebu City).
For information purposes (Prostate Cancer) https://www.cancer.net/cancer-types/prostate-cancer/types-treatment