<Tr> <Td> rad </Td> <Td> rad </Td> <Td> 100 erg ⋅ g </Td> <Td> 1953 </Td> <Td> 0.010 Gy </Td> </Tr> <Tr> <Td> gray </Td> <Td> Gy </Td> <Td> J ⋅ kg </Td> <Td> </Td> <Td> SI </Td> </Tr> <Tr> <Td> Dose equivalent (H) </Td> <Td> röntgen equivalent man </Td> <Td> rem </Td> <Td> 100 erg ⋅ g </Td> <Td> 1971 </Td> <Td> 0.010 Sv </Td> </Tr> <Tr> <Td> sievert </Td> <Td> Sv </Td> <Td> J ⋅ kg × W </Td> <Td> 1977 </Td> <Td> SI </Td> </Tr>

Radiation exposure is measured in which of the following units (also called roentgens)