Roentgen (unit) One roentgen deposits of absorbed dose in dry air, or in soft tissue. One roentgen of X-rays may deposit anywhere from in bone depending on the beam energy. This tissue-dependent conversion from kerma to absorbed dose is called the F-factor in radiotherapy contexts. The conversion depends on the ionizing energy of a reference medium, which is ambiguous in the latest NIST definition. The roentgen has its roots in the Villard unit defined in 1908 by the American Roentgen Ray Society as "the quantity of radiation which liberates by ionisation one esu of electricity per cm of air under normal conditions
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.