Which of the following results in the greatest reduction of radiation to the patient?

All of the following are SI or international units of radiation measurement except:   

Longer wavelength x-rays that are too weak to penetrate patient tissues and contribute to the production of a dental radiograph are removed from the primary X-ray beam by: 

To further protect our patients from excessive exposure to radiation in dental procedures, the ADA recommends the use of: 

Which of the following traditional units and SI units are correctly matched?

According to government guidelines, the annual MPD of radiation for an occupationally exposed worker must not exceed:

Identify the radiographic technique that provides less radiation exposure to the thyroid gland and eyes:

Longer wavelength photons, like wavelength of T.V. and radio waves, are measure in:   

Which of the following must be worn when exposing radiographs?

Which of the following is an example of a non-critical instrument?