Roentgen (unit) absorbed dose in a wide range of matter. When measuring absorbed dose in a human due to external exposure, the SI unit the gray, or the related non-SI rad are used. From these can be developed the dose equivalents to consider biological effects from differing radiation types and target materials. These are equivalent dose, and effective dose for which the SI unit sievert or the non-SI rem are used. The following table shows radiation quantities in SI and non-SI units: Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays
Roentgen Stories Roentgen Stories Roentgen Stories is a DVD collective of four promotional videos (PVs) by popular Japanese rock vocalist Hyde. Released November 3, 2004 by Ki/oon Records and Haunted Records. It features the PVs of the three singles and additional bonus music video. All songs are from his first solo album, Roentgen. The order the videos are arranged on the DVD are coincidentally the order in which they were released. The videos are meant to be watched in a series, so that the four together tell a story, with prevailing themes of life and death and the mingling of the two.