title: First experience in using Novalis shaped beam radiosurgery in Korea.
abstract: OBJECTIVE
  The role of radiosurgery has become increasingly important in the treatment of intracranial lesions. In this study the authors evaluated the efficacy of the Novalis shaped beam radiosurgery system (dedicated linear accelerator) for various brain and spinal lesions.
  
  
  METHODS
  Between November 2000 and October 2003 the authors treated 356 cases of various intracranial and extracranial lesions with Novalis shaped beam radiosurgery. Of these 356 cases, 109 cases were followed for more than a 2-year period. Fifty patients underwent fractionated stereotactic radiosurgery. Twenty patients (40%) harbored benign tumors (two acoustic neuromas, seven meningiomas, five pituitary adenomas, four optic gliomas, and two craniopharyngiomas), 18 patients (36%) harbored malignant tumors (16 glioblastoma multiforme [GBM], and two metastases), and the others included five with brainstem gliomas, one chordoma, five gliomas, and one with an arteriovenous malformation (AVM). Eighteen of 20 patients with benign tumors had good tumor control. Of 59 patients treated with single-dose stereotactic radiosurgery, 24 had benign intracranial tumors (12 acoustic neuromas, 11 meningiomas, and one pituitary adenoma), 20 had malignant tumors (two GBMs and 18 metastases), and the others were eight AVMs, two glomus jugulare tumors, three lymphomas, one pineal tumor, and one spinal tumor.
  
  
  CONCLUSIONS
  Stereotactic radiosurgery and fractionated stereotactic radiosurgery using the Novalis shaped beam radiosurgery system are effective and safe noninvasive treatment modalities for various intracranial and extracranial lesions.
authors.affiliation: Department of Neurosurgery, Ilsan Paik Hospital, and College of Medicine, Inje University, Gyoung gi, Korea.
authors.forename: Choong Jin
authors.initials: CJ
authors.lastname: Whang
authors.forename: Gi Taek
authors.initials: GT
authors.lastname: Yee
authors.forename: Chan Young
authors.initials: CY
authors.lastname: Choi
authors.forename: Moon-Jun
authors.initials: MJ
authors.lastname: Sohn
authors.forename: Dong Joon
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D001165:Arteriovenous Malformations / Q000601:surgery*; D019583:Dose Fractionation, Radiation; D006801:Humans; D007723:Korea; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009423:Nervous System Neoplasms / Q000175:diagnosis / Q000601:surgery*; D016634:Radiosurgery / Q000379:methods; D012189:Retrospective Studies; D016896:Treatment Outcome