title: Fractionated beam radiotherapy is a special case of continuous beam radiotherapy when irradiation time is small.
abstract: Fractionated beam radiotherapy, in other terms, external beam radiotherapy (EBRT) and continuous beam radiotherapy or Brachytherapy are two modes of radiotherapy techniques. Although in many ways, they appear to be different, radiobiologically, with the help of mathematics, it can be proved that the biological effective dose (BED) of EBRT is similar to BED of Brachytherapy, when irradiation time is small. Here an attempt is made to correlate these two predominant modes of radiotherapy techniques.
authors.affiliation: Department of Radiotherapy, Institute of Post Graduate Education and Research (IPGMER), Kolkata, West Bengal, India.
authors.forename: Jayanta
authors.initials: J
authors.lastname: Biswas
authors.forename: Tapan K
authors.initials: TK
authors.lastname: Rajguru
authors.forename: Krishnangshu B
authors.initials: KB
authors.lastname: Choudhury
authors.forename: Sumita
authors.initials: S
authors.lastname: Dutta
authors.forename: Shyam
authors.initials: S
authors.lastname: Sharma
authors.forename: Aniruddha
authors.initials: A
authors.lastname: Sarkar
mesh_terms: D001918:Brachytherapy / Q000379:methods*; D019583:Dose Fractionation, Radiation; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy