Modern radiotherapy is increasingly evolving towards a reduction in the number of fractions. Stereotactic Body Radiotherapy (SBRT), or as morerecently de ned, SABR (Stereotactic Ablative Body Radiotherapy), is aradiation therapy approach in which high radiation doses are delivered in few fractions focused on small extracranial tumors with rapid dose fall off outside the target. In particular, SBRT/SABR is becoming elective therapy, in several anatomic districts, both for primitive tumors and for metastaticlesions. These results were achieved thanks to a multidisciplinary effort with strong involvement of highly quali ed and skilled professionalstogether with technological progress both in imaging and in treatmentdelivery.

Since we consider this multidisciplinary approach as the key of success,the Italian Association of Radiation Oncology (AIRO) and the Italian Association of Medical Physics (AIFM) organize the 3rd edition of the joint symposium on SBRT within the Fuligno monastery area in Florence.