Changes

Type of materials classified according to their rates of absorption from the respiratory tract to body fluids. Four types Type F is defined as deposited materials that are defined: V readily absorbed into blood from the respiratory tract (very fast absorption), F (fast . Type M is defined as deposited materials that have intermediate rates of absorption), M into blood from the respiratory tract (moderate absorption) and . Type S is defined as deposited materials that are relatively insoluble in the respiratory tract (slow absorption).Type V is defined as deposited materials that, for dosimetric purposes, are assumed to be instantaneously absorbed into blood from the respiratory tract (only certain gases and vapours; very fast absorption). ([[ICRP Publication 130|Publication 130]], 2015)