FSphys	The cumulative physical dose distribution, i.e. corrected for RBE only and not for the biological effect of varying dose per fraction.
FSall	This fractionation schedule assumes that all fields in the entire treatment plan are delivered every day. It therefore consists of only a single unique treatment fraction. Cumulative dose distributions are corrected for RBE and the dose-per-fraction.
FSclin	The exact clinical representation of the delivered treatment plan as obtained from our record and verify system, i.e. using a subset of treatment fields each day. Cumulative dose distributions are corrected for RBE and the dose-per-fraction.
FSsingle	This fractionation schedule assumed that only a single proton field, or a single patch combination, was used each treatment day. The number of unique treatment fractions therefore equaled the number of unique fields (and patch combinations). Cumulative dose distributions are corrected for RBE and the dose-per-fraction.