Roentgen radiation was a type of radiation.
It was relatively harmless to Time Lords, as long as it was expelled quickly enough. According to the Tenth Doctor, Gallifreyan children played with Roentgen bricks. (TV: Smith and Jones)
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Roentgen radiation was a type of radiation.
It was relatively harmless to Time Lords, as long as it was expelled quickly enough. According to the Tenth Doctor, Gallifreyan children played with Roentgen bricks. (TV: Smith and Jones)