Radiography

Which of the following will step up or step down the current coming into an x-ray machine?

• Radiator

• Collimator

• Transformer

• Filter

Which of the following removes the low-energy, long wavelength energy from the beam?

• Filter

• Collimator

• Transformer

• Radiator

Which is the location where thermionic emission occurs?

• Positive cathode

• Positive anode

• Negative cathode

• Negative anode

The mathematical formula used to construct a digital image is called:

• histogram

• algorithm

• matrix

• post processing enhancement

Detective Quantum Efficiency (DQE) is the measure of x-ray absorption efficiency?

• true

• false

Typical range of EXI numbers are?

• 800 - 200

• 100 - 700

• 200 - 800

• 700 - 100

What problem can the over-use of edge-enhancement features cause in a digital image:

• increased noise

• increased fog

• loss of contrast

• loss of diagnostic details

Biological effects of radiation are grouped into two major classes. These classes are ________________ and__________________.

• Chronic effects, latent effects

• Genetic effects, somatic effects

• Genetic effects, chronic effects

• Acute effects, somatic effects

One roentgen is equal to:

• 10 milliroentgen

• 10,000 milliroentgen

• 1,000 milliroentgen

• 1,000,000 milliroentgen

What is remnant radiation?

• Radiation striking the patient

• Radiation striking the target

• Radiation striking the IR

• Radiation leaving the patient