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 The sweeping ballads of Roentgen mask a much more solemn message. An interesting note is that the cover of the Evergreen single features one rose. Angel's Tale features two tulips. Continuing in this pattern, Shallow Sleep, the third single released should have three lilies but instead, the single's cover clearly depicts four lilies. Two theories are possible: The first theory is more likely, though, due to the arrangement of the videos on the DVD and the progression of the story told through them. Roentgen Stories Roentgen Stories is a DVD collective of four promotional videos (PVs) by popular Japanese rock