Radiation Physics
The X-Ray Beam
Image Formation and Radiographic Quality
Exposure Technique Factors
Scatter Control
100
X-Rays were discovered in this year
What is 1895
100
Which x-ray tube component serves as a source of electrons for x-ray production
What is Filament or Cathode
100
The ability of an x-ray photon to remove an atom's electron
What is Ionization
100
What type of relationship does mAs have with exposure dose to the patient
What is Direct Relationship
100
This is the most effective type of beam-restriction
What is Collimator
200
Who discovered X-Rays
Who is Whilhem Roentgen
200
Electrons interact with what to produce x-rays
What is the target or anode
200
The range of exposure intensities an image receptor can accurately detect
What is Dynamic Range
200
This exposure factor affects both the quality and the quantity of the x-ray beam
What is kVp
200
A convergent point would be formed utilizing what type of grid
What is Crossed Focused
300
The Wavelength and frequency have what kind of relationship
What is Inverse
300
This is the cloud of electrons that forms before x-ray production
What is space charge
300
This intraction is responsible for scattering
What is Compton
300
This indicates how much size distortion or augmentation is demonstrated on a radiograph
What is Magnification Factor
300
As collimation increases this also increases
What is Contrast
400
X-radiation is part of which spectrum
What is electromagnetic
400
This type of interaction is the primary type of production regardless of the keV
What is Bremsstrahlung Interaction
400
This interaction is responsible for absorption
What is Photoelectric
400
The typical size of a Small FSS
What is 0.5 mm or 0.6 mm
400
This artifact can occur when the grid frequency used has a similar grid frequency as the CR Reader's laser scanner
What is Moire Effect
500
X-rays have a dual nature, which means that they behave like both waves and what
What is particles
500
This principle explains that as the target angle decreases the effective FSS decreases
What is the Line Focus Principle
500
The diagnostic range of optical densities for general radiography falls in this range. (looking for numbers)
What is 0.50 to 2.0 Optical Density
500
What sort of change in technique factors is necessary when imaging a patient with a Pneumothorax
What is Decrease kVp
500
This is the number of lead lines per unit length
What is Grid Frequency
600

the smallest units for the following:

A. element

B. substance

A. atom

B. molecule

600

Type of contrast would result if a homogeneous was imaged

it would show no contrast

600

This device is used to reduce patient skin dose, make the beam more homogeneous, and harden the x-ray beam.

a filter

600

Foreshortening of a radiographic image will most likely be caused by?

improper tube-film-film alignment

600

Purpose of a grid?

improved image contrast

700

A - Z is used to calculate what

number of neutrons

700

the amount of attenuation that occurs when something is x-rayed depends on what

the atomic number (Z number) of the part that is irradiated

700

what is proportional to kVp2

x-ray intensity

700

The difference between umbra and penumbra.

umbra: true image shadow

penumbra: blurry edges of an image

700

True or False:

scatter production is the purpose of a grid

False: Grid DO NOT have anything to do with the production of scatter. 

800

the control of how many electrons are released at the cathode's filament

mA

800

the type of contrast that would result from x-raying a body area with small differential attentuation

low contrast (long contrast)

800

What part of the H&D curve represents the following:
A.  base + fog

B.  densities above 2.5

A.  toe region

B. shoulder region

800

the degree of sharpness on an image can be improved by increasing what?

amount of collimation

small EFSS

increased SID

800

What is the contrast improvement factor formula?

k = contrast improvement with a grid divided by contrast improvement without a grid

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