Stereotactic radiotherapy (SBRT) gives radiotherapy from many different positions around the body
the beams meet at the tumour
the tumour receives a high dose of radiation and the tissues around it only receive a low dose
also termed stereotactic ablative radiotherapy (SABR)
characterized by high doses of radiation per fraction (5-34 Gy), few overall treatment fractions and an accurate tumour targeting system
doses delivered in SABR are in contrast to those given in conventionally fractionated radiotherapy, which are typically in the range of 1.8-2 Gy per fraction daily, delivered over several weeks
SABR has become widely available due to the advancement of technology in both imaging target tumours and in the precise delivery of radiation
lowers the risk of side effects
usually you have between 1 to 8 treatments
SBRT may be used to treat brain tumours and is called cranial stereotactic radiotherapy
this type of radiotherapy is mainly used to treat very small cancers, including:
lung cancer
liver cancer or liver metastases
cancers in the lymph nodes
spinal cord tumours
Reference:
Lax I, Blomgren H, Näslund I, et al. Stereotactic radiotherapy of malignancies in the abdomen. Methodological aspects. Acta Oncol 1994;33:677-83
Bezjak A. RTOG 0813: Seamless Phase I/II Study of Stereotactic Lung Radiotherapy (SBRT) for Early Stage, Centrally Located, Non-Small Cell Lung Cancer (NSCLC) in Medically In-operable Patients.
Meyer J, Wilbert J, Baier K, et al. Positioning accuracy of conebeam computed tomography in combination with a HexaPOD robot treatment table. Int J Radiat Oncol Biol Phys 2007;67:1220-8.
Li Q, Mu J, Gu W, et al. Frameless stereotactic body radiation therapy for multiple lung metastases. J Appl Clin Med Phys 2014;15:4737.
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