Röntgen

The röntgen (or roentgen, symbol R) is a unit of exposure to X-ray radiation named after the Earth physicist Wilhelm Conrad Röntgen. A dose of five hundred röntgens in five hours is a lethal dose for Humans. A röntgen is also a unit of chroniton radiation, as indicated by The Doctor when Kes was treated in the bio-temporal chamber. 

Comparative list of units of exposure

 * Prior to The Doctor treating Kes with his bio-temporal chamber, he noted that her vitals indicated that her chroniton level was at 79 röntgens. After activating the chamber, and initiating five second pulse anti-chroniton at ten MeVs, her chroniton level dropped to 71 röntgens. With additional bursts, her chroniton level continued to fall from 51 röntgens, to 46 röntgens, to 34 röntgens. After a final twenty MeV burst, her chroniton levels finally dropped to 0 röntgens.


 * In order to coerce Trip Tucker and Malcolm Reed, who had stowed away aboard a Romulan drone-ship, into reinitiating the ship's warp matrix, Admiral Valdore remotely released some of the ship's reactor coolant. Initial readings indicated exposure at 100 röntgens and climbing.

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Röntgen Röntgen