roentgens
X-ray dose measures
Roentgens are units measuring exposure to ionizing radiation, specifically X-rays and gamma rays.
Named after Wilhelm Röntgen, who discovered X-rays, the unit quantifies the radiation's ability to ionize air.
Though largely replaced by the SI unit coulomb per kilogram in scientific contexts, roentgens remain common in discussions of radiation safety and nuclear incidents: The reactor released several hundred roentgens per hour.
unit
State of being unprotected
medical
Breast cancer screening X-ray
- fluoroscopyContinuous X-ray video imaging
- radiologistDoctor analyzing medical images
- technicianSkilled practical worker
- screeningEvaluative selection process
therapy
Medical radiation for cancer
- oncologyCancer medicine specialty
- megavoltageMillions of volts
- brachytherapyLocalized implanted radiation oncology
- fractionationSeparating mixture into components
safety
Space between two points
- shieldingProtecting from harm
- timeMeasured passage of moments
- contaminationIntroduction of impurities
- decontaminationRemoving dangerous substances
discovery
Year in the 1890s
- fluorescenceLight emitted after absorption
- serendipityAccidental fortunate discovery
- breakthroughSudden important advance
- physicsScience of matter and energy
exposure
State of being unprotected
gray · curie · calibration · dosimeter · electroscope
mammography
Breast cancer screening X-ray
- fluoroscopyContinuous X-ray video imaging
- radiologistDoctor analyzing medical images
- technicianSkilled practical worker
radiotherapy
Medical radiation for cancer
- oncologyCancer medicine specialty
- megavoltageMillions of volts
- brachytherapyLocalized implanted radiation oncology
distance
Space between two points
- shieldingProtecting from harm
- timeMeasured passage of moments
- contaminationIntroduction of impurities
1895
Year in the 1890s
- fluorescenceLight emitted after absorption
- serendipityAccidental fortunate discovery
- breakthroughSudden important advance