Water bag bolus in external air cavities to produce dose homogeneity.
High energy photon beams traversing large iatrogenic air cavities can lead to surface underdosage and overdosage because of high exit dose. A water bag bolus in such external cavities is a remarkably simple and reproducible means of producing dosage homogeneity.
D000293:Adolescent; D005134:Eye Neoplasms / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D005260:Female; D006801:Humans; D008437:Maxilla / Q000473:pathology / Q000528:radiation effects; D008441:Maxillary Neoplasms / Q000532:radiotherapy; D009364:Neoplasm Recurrence, Local; D009666:Nose / Q000473:pathology / Q000528:radiation effects; D009915:Orbit / Q000473:pathology / Q000528:radiation effects; D011878:Radiotherapy / Q000009:adverse effects / Q000379:methods*; D012175:Retinoblastoma / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery