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

Which of the following contributes most to  occupational exposure?

What type of personnel radiation monitor device has a gas-filled ionization chamber and provides a reading at any time via Internet connection?

Cosmic radiation occurs in which two forms?

Of the following, which are disadvantages of using pocket ionization chambers as personnel dosimeters?1. They can discharge if they are subjected to mechanical shock.2. Because these devices provide no permanent legal record of exposure, health care facilities that use this method to record personnel exposure must delegate someone to keep such a record.3. If not read each day, the dosimeter may give an inaccurate reading because the electric charge tends to escape.

Sources of natural background radiation contributing to whole-body radiation dose include 1. dental x-rays 2. terrestrial radionuclides 3. internal radionuclides

The degree of x-ray attenuation is directly related to what quality of the radiographed part?

Through which of the following routes can radon enter houses?1. Crawl spaces under living areas2. Floor drains and sump pumps3. Porous cement block foundations

In the electromagnetic spectrum, higher frequencies are associated with

Because of the OSL dosimeter’s sensitivity down to as low as 10 µSv for x-ray and gamma ray photons in the energy range 5 keV to 40 MeV, it is an excellent and practical monitoring device for