[Dose distribution of pendulum fields in the field border plane].
Calculations (program SIDOS-U2) and LiF measurements taken in a cylindric water phantom are used to investigate the isodose distributions of different pendulum irradiation methods in a plane which is parallel to the central ray plane and crosses the field borders at the depth of the axis. The dose values compared to the maximum values of the central ray plane are completely different for each pendulum method. In case of monoaxial pendulum methods around small angles, the maximum dose value found in the border plane is less than 50% of the dose in the central ray plane. The relative maximum of the border plane moves to tissues laying in a greater depth. In case of bi-axial methods, the maximum value of the border plane can be much more than 50% of the maximum dose measured in the central ray plane.
D006801:Humans; D008961:Models, Structural; D011879:Radiotherapy Dosage; D011881:Radiotherapy, Computer-Assisted
Dosisverteilungen von Pendelfeldern in der Ebene der Feldränder.