Systems, machine readable storage, and methods for solving a respiratory tract model of radiation dosage. Steps include selecting input parameters associated with a respiratory tract model, computing a probability density function for the input parameters, and solving the respiratory tract model using the computed probability density functions.
STATEMENT AS TO FEDERALLY FUNDED RESEARCH
 This invention was made with U.S. government support under grant numbers R32/CCR409769 and R32/CCR416743 awarded by the Centers for Disease Control and Prevention and under a grant awarded by the Department of Energy (Nuclear Engineering and Health Physics Fellowship Program). The U.S. government may have certain rights in the invention.