Treatment Techniques in External Beam Radiation Therapy: A Review

Abstract

Radiation therapy being most general treatment modality to cure patients with different malignancies covers more than fifty percent of cancer burden. Since its inception for treatment of cancer and other malignancies in 1896, development of new devices from time to time has brought several changes in techniques of radiation therapy. The present study aims to present an outlook towards the basic concepts involved related to radiation therapy and to highlight the development of the various techniques of radiation therapy involving wide range of energies from x-ray, γ-ray and charged particles. This presentation gives an outlook for various advanced techniques of radiation therapy like external beam radiation therapy, intensity modulated radiation therapy, image guided radiation therapy, stereotactic radiation therapy, brachy-therapy etc. This study gives an introduction ofutilization of x-rays, γ-rays, photon beams and light charged particles i.e. electrons as a source of radiation used for radiation therapy andit is concluded that the electron beam therapy is more suitable for superficial tumors like nasal nodes, head and neck cancers and breast carcinomas. It is also beneficial in providing the radiation boost to the residual cancers after surgery. Since the energy of the beam drop off rapidly after the desired depth, so that the sensitive body parts can be escaped from the radiation effects.

QUALITY ASSURANCE/QUALITY CONTROL (DAILY CHECK) PADA PESAWAT TELETERAPI EKSTERNA DI INSTALASI RADIOTERAPI RSUP Prof DR I.G.N.G. NGOERAH DENPASAR

“…Teknik radioterapi secara bertahap beralih dari 2D menjadi 3DCRT merupakan teknik radiasi tingkat lanjut yang memanfaatkan teknologi pencitraan dan menghasilkan gambar tiga dimensi dari tumor beserta organ jaringan. IMRT merupakan salah satu pengembangan radioterapi konformal yang bertujuan menghindarkan jaringan sehat yang radiosensitif tetapi tetap memberikan dosis yang optimal pada jaringan tumor dan lebih termodulasi (Singh et al, 2021 (Ishikura, 2008).…”