title: Daily targeting of liver tumors: screening patients with a mock treatment and using a combination of internal and external fiducials for image-guided respiratory-gated radiotherapy.
abstract: The feasibility and accuracy of using a mock treatment to screen suitable patients for respiratory-gated image-guided radiotherapy was investigated. Radio-opaque fiducials implanted adjacent to the liver tumor were used for online positioning to minimize the systematic error in patient positioning. The consistency in the degree of correlation between the external and internal fiducials was analyzed during a mock treatment. This technique could screen patients for gated therapy, reduce setup inaccuracy, and possibly individualize treatment margins.
authors.affiliation: Department of Radiation Oncology, MD Anderson Cancer Center, Houston, Texas 77030, USA. skrishnan@mdanderson.org
authors.forename: Sunil
authors.initials: S
authors.lastname: Krishnan
authors.forename: Tina Marie
authors.initials: TM
authors.lastname: Briere
authors.forename: Lei
authors.initials: L
authors.lastname: Dong
authors.forename: Ravi
authors.initials: R
authors.lastname: Murthy
authors.forename: Chaan
authors.initials: C
authors.lastname: Ng
authors.forename: Peter
authors.initials: P
authors.lastname: Balter
authors.forename: Radhe
authors.initials: R
authors.lastname: Mohan
authors.forename: Michael T
authors.initials: MT
authors.lastname: Gillin
authors.forename: A Sam
authors.initials: AS
authors.lastname: Beddar
mesh_terms: D003287:Contrast Media / Q000737:chemistry; D006046:Gold; D006801:Humans; D008099:Liver / Q000503:physiopathology; D008113:Liver Neoplasms / Q000532:radiotherapy*; D009068:Movement; D010919:Placebos; D012119:Respiration
chemical_list: D003287:Contrast Media; D010919:Placebos; D006046:Gold