Principles of Imaging II Final

Radiation that originates within the x-ray tube, but not at the focal spot is called:

• scatter radiation

• primary radiation

• off-focus radiation

• secondary radiation

Tags

NGSS.HS-PS4-4

Exit/Remnant beam consists of which type of photon(s):

• photoelectric & compton scatter

• transmitted & compton scatter

• photoelectric & compton scatter

• transmitted only

Tags

NGSS.HS-PS4-4

NGSS.HS-PS4-3

Geometric unsharpness around the periphery of the true image is termed:

• penumbra

• elongation

• foreshortening

• distortion

What type of grid offers the least amount of positioning latitude?

• linear grid

• focus grid

• parallel grid

• crosshatch grid

Proper beam restriction will result in: improved image quality, reduced patient dose, increased contrast.

• TRUE

• FALSE

Tags

NGSS.HS-PS4-5

What effect will beam penetrability have on contrast?

• Increased kV will increase contrast

• Increased kV will decrease contrast

• Decreased kV will decrease contrast

• kV has no influence on contrast

The distance with which a focused grid may be used is determined by:

• the convergence point

• the height of the lead strips divided by the distance between

• the grids selectivity

• the grids k-factor

Beam part alignment is the primary controlling factor of:

• distortion

• motion

• magnification

• resolution

The number of lead strips per inch or centimeter in a grid is defined as:

• grid ratio

• contrast improvement factor

• grid frequency

• Bucky factor

Which of the following increases as collimation increases?

• Density

• Fog

• Scatter production

• Contrast