Gastorf R, Humphries L, Rozenfeld M
Med Phys. 1986 Sep-Oct;13(5):751-4. doi: 10.1118/1.595842.
Cylindrical ionization chamber descriptions and physical dimensions that are necessary for the calculation of Awall and Ngas are presented. Also included are the corresponding calculated values of Awall and Ngas/(NxAion).