Ch 3. Dental Radiation Basics

Front

In dental imaging, the quality of the x-ray beam is controlled by: kilovoltage, milliamperage, exposure time, source to receptor distance

Back

kilovoltage

Front

Identify the kilovoltage range for current dental x-ray machines.

Back

70-100 kV

Answer explanation

The average range for most dental x-ray machines is 65-100kV. Lower settings may not penetrate the tissue adequately and cause high contrast images; higher settings increase the radiation the patient receives and cause low contrast images.

Front

A higher kilovoltage produces x-rays with:
- greater energy levels
- shorter wavelengths
- more penetrating ability
- all of the above

Back

all of the above

Answer explanation

An increase in kilovoltage increases the quality of the beam. It will demonstrate greater energy and shorter, more penetrating wavelengths.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Front

Identify the unit of measurement used to describe the amount of electric current flowing through the x-ray tube

Back

ampere

Front

Radiation produced with high voltage results in:

Back

short wavelengths

Tags

NGSS.HS-PS4-1

Front

In dental imaging, the quantity of radiation produced is controlled by: kilovoltage, milliamperage, exposure time, milliamperage and exposure time

Back

milliamperage and exposure time

Front

Increasing milliamperage results in an increase in:
- temperature of the filament
- mean energy of the beam
- number of x-rays produced
- both a and c

Back

temperature of the filament and number of x-rays produced

Tags

NGSS.HS-PS4-3

Front

Identify the milliamperage range used for current dental x-ray machines: 1 - 5 mA, 6 - 8 mA, 9 - 15 mA, greater than 15 mA

Back

6 - 8 mA

Answer explanation

The recommended mA setting for dental imaging is 6-8 mA. A setting above 15 mA may cause excessive heat in the x-ray tube.

Front

The overall blackness or darkness of an image is termed

Back

density

Front

If kilovoltage is decreased with no other variations in exposure factors, the resultant image will:

Back

appear lighter