Chapter 3 Radbio

When a technical exposure factor of 100 kVp is selected, which of the following occurs?

• The beam will contain photons having energies of 100 keV or less, with an average effective energy of approximately 33 keV.

• The beam will contain all photons having an effective energy of 100 keV.

• The electrons will be accelerated from the cathode to the anode with an average effective energy of 33 keV.

• The electrons will be accelerated from the anode to the cathode with an average effective energy of 33 keV.

Annihilation radiation is used in which of the following modalities?

• Positron emission tomography

• Digital mammography

• Computed tomography

• Computed radiography

The symbol Z indicates

• atomic number of an atom.

• atomic weight of an atom.

• fluorescent yield.

• the number of vacancies in an atomic shell.

Which of the following terms are synonymous?

1. Coherent scattering

2. Classical scattering

3. Unmodified scattering

• 1 and 3 only

• 1 and 2 only

• 2 and 3 only

• 1, 2, and 3

Most scattered radiation produced during radiographic procedures is the direct result of which of the following?

• Photoelectric absorption

• Nuclear decay

•  Compton interactions

• Image-formation electrons

Compton scattering is synonymous with

• incoherent scattering.

• coherent scattering.

• photoelectric absorption.

• photodisintegration.