Fig. 2From: Development of a PMMA phantom as a practical alternative for quality control of gamma knife® dosimetryPictures of the experimental setup for measurement of the absorbed dose to water with different phantoms. a The PMMA phantom with a PTW 31010 ionization chamber was mounted to the Leksell Gamma Knife Perfexion for dose rate measurement. b The spherical water-filled phantom with a PTW 31010 ionization chamber. c A solid water phantom with a PTW 31010 ionization chamber. d The PMMA phantom with the xz-plane film-hosting inner phantom. The film shows the dose distribution of the 16-mm collimator in the xz-planeBack to article page