Hello, I’m using the Digimouse voxel phantom in FLUKA to apply the MIRD formalism (AF, SAF) and need to calculate the spleen→liver SAF. I’ve defined a volumetric source of 10 M 4 MeV photons uniformly in the spleen and must score only the energy deposited in the liver to compute:
AF= Energy deposited in liver / Energy emitted from spleen source ; SAF = AF / Mass of target organ
Which FLUKA scoring card (e.g. USRBIN SCORE=ENERGY, SCORE=DOSE, USRTRACK, etc.) and what precise settings for PART, REGION, and the binning parameters should I use to capture exactly the liver deposition—excluding all other regions—so that my SAF calculation aligns rigorously with MIRD? Thank you for your advice.