Thompson, A M A nomogram for the estimation of an average tissue--air ratio for rotation therapy planning. [electronic resource] - Physics in medicine and biology Jan 1976 - 147-9 p. digital Publication Type: Journal Article ISSN: 0031-9155 Standard No.: 10.1088/0031-9155/21/1/015 doi Subjects--Topical Terms: HumansNeoplasms--radiotherapyPelvisRadiotherapy DosageRotation