title: Linear accelerator and gamma knife-based stereotactic cranial radiosurgery: challenges and successes of existing quality assurance guidelines and paradigms.
abstract: Intracranial stereotactic radiosurgery has been practiced since 1951. The technique has expanded from a single dedicated unit in Stockholm in 1968 to hundreds of centers performing an estimated 100,000 Gamma Knife and linear accelerator cases in 2005. The radiation dosimetry of small photon fields used in this technique has been well explored in the past 15 years. Quality assurance recommendations have been promulgated in refereed reports and by several national and international professional societies since 1991. The field has survived several reported treatment errors and incidents, generally reacting by strengthening standards and precautions. An increasing number of computer-controlled and robotic-dedicated treatment units are expanding the field and putting patients at risk of unforeseen errors. Revisions and updates to previously published quality assurance documents, and especially to radiation dosimetry protocols, are now needed to ensure continued successful procedures that minimize the risk of serious errors.
authors.affiliation: San Diego Gamma Knife Center, Grossmont Cancer Center, La Jolla, CA, USA. stevegoetsch@sdgkc.com
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Goetsch
mesh_terms: D002138:Calibration; D006801:Humans; D019300:Medical Errors / Q000517:prevention & control; D010315:Particle Accelerators / Q000295:instrumentation / Q000592:standards*; D019047:Phantoms, Imaging / Q000592:standards; D017785:Photons / Q000627:therapeutic use; D017410:Practice Guidelines as Topic / Q000592:standards*; D011786:Quality Control; D011874:Radiometry; D016634:Radiosurgery / Q000295:instrumentation / Q000592:standards*; D011879:Radiotherapy Dosage