Radiography

An intensifying screen that contains large crystals of calcium produces which of the following characteristics?

• Slow screen, more detail, low grain

• Fast screen, more detail, high grain

• Slow screen, less detail, low grain

• Fast screen, less detail, high grain

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

In film radiography, calcium tungstate screens:

• Fluoresce in the green spectrum

• Fluoresce in the blue spectrum

• Require a blue safelight in the darkroom

• Are more efficient than rare earth screens

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Which of the following statements is TRUE about x-ray film cassettes?

• It can be made of any plastic as long as it is bendable

• The film can be held loosely within the cassette as long as it is light-tight

• It must be sturdy and have a strong reliable closure

• It is designed to absorb scatter radiation

Tags

NGSS.HS-PS4-4

Non-screen film would most likely be used to take which type of radiography?

• Thoracic

• Dental

• Skull

• OFA Hip

Tags

NGSS.HS-PS4-5

An x-ray film exposed to visible light and developed would appear:

• White

• Clear

• Black

• Purple

Tags

NGSS.HS-PS4-5

Which of the following processing factors may cause a developed film radiograph to be too dark?

• Diluted fixer solution

• Low developer temperature

• Over-concentrated developer solution

• Contaminated developer solution

A finished film radiograph that is too dark can be caused by all of the following, EXCEPT:

• Too high of kVp

• Too low of kVp

• Overmeasurement of the anatomy

• Under-development

What is the chemical compound that allows film to respond to light?

• phosphor crystals

• elemental silver

• calcium tungstate

• silver halide crystals

Which of the following is NOT a way to reduce our exposure to x-ray radiation?

• Wear protective clothing such as a lead gown

• Distance ourselves from the source

• Reduce the length of the exposure

• Increase the number of x-ray photons in the primary beam

Medical x-rays are:

• Short wavelength / low frequency

• Short wavelength / high frequency

• Long wavelength / low frequency

• Long wavelength / high frequency

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-4