Pfalzner P M
J Can Assoc Radiol. 1983 Dec;34(4):298-300.
The concepts of physical quantity and physical units of measurement are presented. The relations between quantities, the names and symbols for SI (International System) base units, derived units and special names of SI units are illustrated. From the definition of the radiation quantity dose equivalent, the SI unit for this quantity is shown to be dimensionally identical with the joule per kilogram. The sievert (Sv) is the special (restricted) name for the SI unit of the quantity dose equivalent, with 1 Sv = 1 J/kg.
介绍了物理量和物理测量单位的概念。阐述了各量之间的关系、国际单位制（SI）基本单位的名称和符号、导出单位以及SI单位的特殊名称。从辐射量剂量当量的定义出发，表明该量的SI单位在量纲上与焦耳每千克相同。希沃特（Sv）是剂量当量这个量的SI单位的特殊（限定）名称，1 Sv = 1 J/kg。
