抄録
In the field of radiation protection, quality factor Q (L) and radiation weighting factor wR are important coefficients for estimating both radiation protection and operational quantities to the mixed types of radiation exposure. However, some inconsistencies might be found between Q (L) and wR for estimating effective dose, for example. Some inconsistencies are attributed to incomplete definition of terms Q (L) and wR. This report presents the root and evolution of quality factor Q (L) and radiation weighting factor wR for the years 1931-2007, to clarify the current issues of inconsistencies to be solved.