Exam 4: Radiation Quantities and Units

Which of the following are early tissue reactions of ionizing radiation that were experienced by early radiation workers? 1)Diffuse redness of skin 2)Blood disorders 3)Organ atrophy 4)Intestinal disorders

Among physicians,cancer deaths attributed to x-ray exposure were reported as early as

The whole-body TEDE regulatory limit for exposed personnel is _____________ and ______________ for the general public.

In therapeutic radiology what SI units are now routinely used to specify absorbed dose?

Who discovered x-rays on November 8,1895?

How is dose area product usually specified?

Alpha particles have a radiation weighting factor (WR)that is numerically equal to

The total kinetic energy released in a unit mass (kilogram)of air and expressed in metric units of joules per kilogram is

Which of the following units of measure are not SI units? 1)Roentgens 2)Coulombs per kilogram,grays,sieverts 3)Rads and rems

Cataract formation,fibrosis,reduced fertility and sterility are classified as

For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV),which of the following radiation quantities may be defined as the measure of the total electric charge of one sign,either all pluses or all minuses,per unit mass that these two types of radiation generate in dry air at standard temperature and pressure (760 mm Hg or 1 atmosphere at sea level and 22° C)?

What do radiation weighting factors take into consideration? 1)The overall risk of exposure to humans from ionizing radiation 2)Both the internal and external dose measurements 3)The fact that some types of radiation are more efficient at causing biologic damage than other types of radiation for a given dose.

In the SI system,an energy absorption of 1 J/kg of matter in the irradiated object equals which of the following?

As the intensity of x-ray exposure of the air volume increases,the number of electron-ion pairs produced

Which of the following is essentially the sum total of air kerma over the exposed area of the patient's body surface?

Which of the following formulas is used to calculate effective dose? 1)EfD = (D × WR)₁ + (D × WR)₂ + (D × WR)₃ 2)EfD = D × WR × WT 3)EfD = D ÷ WR × WT

Which of the following types of ionizing radiation produce virtually the same biologic effect in body tissue for equal absorbed doses?

Which of the following is the SI unit of electric current?

What instrument can be calibrated to read air kerma?

If 400 people receive an average effective dose of 0.25 Sv,what is the collective effective dose?