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Electromagnetic radiation travels or propagates through space in the form of a wave but can interact with matter as a particle of energy called a photon. This dual nature is referred to 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)?

Which of the following results in all-directional scatter?

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

What is used to account for differences in tissue characteristics when determining effective dose to biologic material? 1. Tissue weighting factor 2. Radiation weighting factor 3. Absorbed dose

How is dose area product usually specified?

Sources of medical radiation exposure include  1. computed tomography 2. sonography 3. magnetic resonance imaging

In a hospital setting, which of the following professionals is expressly charged by the hospital administration with being directly responsible for the execution, enforcement, and maintenance of the ALARA program?

The person responsible for ascertaining that all radiation guidelines are adhered to and that personnel understand and use radiation safety measures is the 

The single  most important source of scatter radiation in both radiography and fluoroscopy is the