A technique for matching orthogonal megavoltage fields.
D005373:Film Dosimetry; D006258:Head and Neck Neoplasms / Q000532:radiotherapy; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy; D013679:Technology, Radiologic