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
Kevin Roentgen Philm. In November 2012 and May 2013, Goldsboro toured the UK garnering them favorable reviews in UK publications Mojo Magazine, Classic Rock Magazine, Metal Hammer and Kerrang!, as well as airplay on XFM London and Radio 2. In 2017, Roentgen began playing guitar with L.A.-based rock band Buckcherry. Roentgen has also written and produced original music compositions for Fox TV promos including "New Girl, Ben and Kate, Enlisted, The Following, ADHD, Glee, Hell's Kitchen, Allen Gregory, American Idol, Lone Star, Chicago Code, Fringe, Bones, Cops, Empire, The Exorcist, Rosewood, Gotham, Ghosted and The Orville." Kevin Roentgen Kevin Roentgen (pronounced rent-gehn)