RAD Chapter 5

In dental radiography, the term ________ is used to describe the mean energy or penetrating ability of the x-ray beam.

• quality

• quantity

Which of the following statements is true of wavelength in reference to radiation?

• X-rays with shorter wavelength have less penetrating power.

• X-rays with longer wavelength have less penetrating power.

______________ is a measurement of force that refers to the potential difference between two electrical charges.

• Wavelength

• Voltage

When the kilovoltage is increased

• photons move from the anode to the cathode with more speed.

• electrons move from the cathode to the anode with more speed.

Which of the following statements is true of the use of voltage in dental x-ray equipment?

• Dental x-ray equipment uses more than 70 kilovolts for the production of x-rays.

• Dental x-ray equipment requires the use of 60 to 70 kilovolts for the production of x-rays.

The kV represents

• the maximum or peak voltage of an alternating current.

• the maximum or peak voltage of a direct current.

When kilovolt is increased, a

• higher energy x-ray beam with increased penetrating ability results.

• higher energy x-ray beam with decreased penetrating ability results.

(1) Density is the overall darkness or blackness of a dental image. (2) When the kilovoltage is increased while other exposure factors remain constant, the resultant image exhibits a decreased density and appears lighter.

• The first statement is true; the second statement is false.

• The first statement is false; the second statement is true.

When lower kilovoltage settings are used, an image with ____ will result.

• high contrast

• low contrast

An image with “low” contrast

• is useful for the detection of periodontal or periapical disease and has many shades of gray.

• is useful for the detection and progression of dental caries and has many shades of gray.