title: In Reply to Yartsev and Chen.
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Grams
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Luis E
authors.initials: LE
authors.lastname: Fong de Los Santos
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Lindsay C
authors.initials: LC
authors.lastname: Brown
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Charles S
authors.initials: CS
authors.lastname: Mayo
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Sean S
authors.initials: SS
authors.lastname: Park
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Yolanda I
authors.initials: YI
authors.lastname: Garces
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Olivier
authors.affiliation: Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Debra H
authors.initials: DH
authors.lastname: Brinkmann
mesh_terms: D006801:Humans; D008175:Lung Neoplasms / Q000532:radiotherapy*; D056888:Patient Positioning / Q000379:methods*; D011874:Radiometry / Q000379:methods*; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*