title: The current status of image-guided external beam radiotherapy for prostate cancer.
abstract: OBJECTIVE
  To assess the current status and technological advances in image-guided external beam radiotherapy for prostate cancer.
  
  
  RESULTS
  Modern imaging has improved the ability to define radiotherapy target volumes. Specifically, treatment margins have been reduced through the use of treatment planning and image-guidance technology. Increasing dose has led to increased disease control. Concurrent technological advances may improve treatment-related toxicity. Data continues to emerge on patient selection, treatment schedule, and use of additional systemic therapy in conjunction with radiation.
  
  
  CONCLUSIONS
  In the present article, we review recent developments in radiation planning, image guidance, patient selection and fractionation, dose escalation, toxicity, systemic therapy, and follow-up.
authors.affiliation: Department of Radiation Oncology, Taussig Cancer Center, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA. stephak@ccf.org
authors.forename: Kevin L
authors.initials: KL
authors.lastname: Stephans
authors.forename: Ping
authors.initials: P
authors.lastname: Xia
authors.forename: Rahul D
authors.initials: RD
authors.lastname: Tendulkar
authors.forename: Jay P
authors.initials: JP
authors.lastname: Ciezki
mesh_terms: D004307:Dose-Response Relationship, Radiation; D006801:Humans; D008297:Male; D018579:Patient Selection; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D011878:Radiotherapy / Q000379:methods* / Q000639:trends*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome