[Stereotactic ablative body radiotherapy: Which machine for which therapeutic indication? A focus on prostate cancer]

For the last decade, stereotactic body radiotherapy has become a leading treatment for localized prostate cancer. It can be delivered using a wide array of radiotherapy machines. However, although numerous clinical studies, both prospective and retrospective, have been published, the different techniques have never been properly compared. This article aims at giving an overview of the published trials, and at pointing out the major differences between the machines, from a clinical (efficacy end toxicity), technical and radiobiological point of view.