History
Who made the initial discovery of x-rays
Wilhelm Conrad Roentgen
What does WR stand for?
Radiation weighting factor
Define Air kerma in simple terms
the total kinetic energy released per unit mass of air
Name the SI unit for absorbed dose
Gray (Gy)
Who goes to the SuperBowl on February 8, 2026 (you must name both teams)
Patriots vs Seahawks
What was the first x-ray ever taken?
Roentgen's wife's hand
X-ray and Gamma Ray Radiation Weighting Factor
1
What is equivalent dose typically used for?
radiation protection purposes, when a pt receives exposure from various types of ionizing radiation
What unit is used to indicate kinetic radiation energy deposited or absorbed in a mass of tissue
Gyt
One sievert is equal to how many rem?
1 Sv = 100 rem
Who invented the fluoroscope?
Thomas Edison
A value that denotes the percentage of the summed stochastic risk stemming from irradiation of tissue to the all-inclusive risk, when the entire body is irradiated in a uniform fashion
Tissue Weighting Factor (WT)
What radiation quantity is defined as "The sum of the weighted equivalent doses for all irradiated tissues or organs"
effective dose
What is a coulomb?
the basic unit of electric charge
Name 2 stochastic events that could occur
- Cancer
- Genetic (hereditary) effects
Who was the first American radiation fatality?
Clarence Madison Dally
what is the radiation weighting factor for alpha particles
20
What is the formula for effective dose
EfD= D x Wr x Wt
What does DAP stand for and what are its units?
Dose Area Product
mGy-cm2
KERMA is an acronym that stands for?
- kinetic energy released in air
- kinetic energy released in material
- kinetic energy released per unit mass
Name the exact date x-rays were discovered
November 8, 1895
What weighting factor must be used when determining EqD?
Radiation weighting factor (WR)
what is ColEfd (what does it stand for and give definition)
Collective effective dose
- used in radiation protection to describe internal and external dose measurements
Name the metric unit used to measure Air Kerma
joules per kilogram (J/kg)
What are the 2 formulas for equivalent dose?
- EqD = D x Wr
OR
- Sv = Gy x Wr