Mammo Physics Registry Review Questions and
Answers 2024
The material used for the exit port of the mammography tube is necessary because:
a. The intensity of the beam is less on the anode side than on the cathode side.
b. Regular glass would harden the emerging beam.
c. The intensity of the beam is more on the anode side than on the cathode side.
d. The regular glass would soften the emerging beam. ** Answ** b. Regular glass
would harden the emerging beam.
Which of the following statements are NOT true regarding magnification
mammography?
a. With magnification, patient dose increases
b. Magnification does not use a grid
c. Magnification can be used to assess suspicious lesions
d. In general, magnification can be used to image the entire breast with one exposure
** Answ** d. In general, magnification can be used to image the entire breast with one
exposure
QC duties of the mammographer include testing or monitoring of all of the following
EXCEPT:
a. Phantom image
b. Collimation assessment
c. Compression
d. None of the above ** Answ** b. Collimation assessment
The intensity of the x-ray beam from the cathode side of the tube is generally higher
because:
a. Soft characteristic radiation emerges from the anode side
b. The cathode side is directed to the thickest part of the breast
,c. The heel effect causes variation in the intensity of the x-ray beam
d. The heel effect increases the intensity of the beam at the anode side ** Answ** c.
The heel effect causes variation in the intensity of the x-ray beam
The Air-Gap used in magnification allows increased subject contrast by:
a. Increasing scatter
b. Reducing scatter
c. Reducing motion
d. Increasing motion ** Answ** b. Reducing scatter
Adjusting the image contrast is achieved by:
a. Changing the window level
b. Decreasing the pixel size
c. Changing the window width
d. Increasing the pixel size ** Answ** c. Changing the window width
In a digital image, what determines the matrix size?
a. The number of bits in each pixel
b. The number of pixels in the rows and columns
c. The picture elements in the matrix
d. The number of gray shades that a pixel can produce ** Answ** b. The number of
pixels in the rows and columns
Digital mammography units often use ________ as the target material.
a. Tungsten
b. Rhodium
c. Molybdenum
d. Aluminum ** Answ** a. Tungsten
, Scintillators are used to convert:
a. X-rays to light
b. X-rays to electrons
c. Light to electrons
d. Electrons to light ** Answ** a. X-rays to light
The repeat rate should be analyzed if the rate changes from the previous measure rate
by more than:
a. +/- 2
b. +/- 3
c. +/- 4
d. +/- 5 ** Answ** a. +/- 2
In the low kVp range using a molybdenum target tube, what type of photon interaction
predominates?
a. Photoelectric
b. Compton
c. Bremsstrahlung
d. Coherent ** Answ** a. Photoelectric
Grids with strips that are linear but slanted to match the divergence of the x-ray beam
are ____ grids.
a. Parallel
b. Crossed
c. Focused
d. Moving ** Answ** c. Focused
What does the actual focal spot size measure?
a. The area on the anode exposed to electrons
Answers 2024
The material used for the exit port of the mammography tube is necessary because:
a. The intensity of the beam is less on the anode side than on the cathode side.
b. Regular glass would harden the emerging beam.
c. The intensity of the beam is more on the anode side than on the cathode side.
d. The regular glass would soften the emerging beam. ** Answ** b. Regular glass
would harden the emerging beam.
Which of the following statements are NOT true regarding magnification
mammography?
a. With magnification, patient dose increases
b. Magnification does not use a grid
c. Magnification can be used to assess suspicious lesions
d. In general, magnification can be used to image the entire breast with one exposure
** Answ** d. In general, magnification can be used to image the entire breast with one
exposure
QC duties of the mammographer include testing or monitoring of all of the following
EXCEPT:
a. Phantom image
b. Collimation assessment
c. Compression
d. None of the above ** Answ** b. Collimation assessment
The intensity of the x-ray beam from the cathode side of the tube is generally higher
because:
a. Soft characteristic radiation emerges from the anode side
b. The cathode side is directed to the thickest part of the breast
,c. The heel effect causes variation in the intensity of the x-ray beam
d. The heel effect increases the intensity of the beam at the anode side ** Answ** c.
The heel effect causes variation in the intensity of the x-ray beam
The Air-Gap used in magnification allows increased subject contrast by:
a. Increasing scatter
b. Reducing scatter
c. Reducing motion
d. Increasing motion ** Answ** b. Reducing scatter
Adjusting the image contrast is achieved by:
a. Changing the window level
b. Decreasing the pixel size
c. Changing the window width
d. Increasing the pixel size ** Answ** c. Changing the window width
In a digital image, what determines the matrix size?
a. The number of bits in each pixel
b. The number of pixels in the rows and columns
c. The picture elements in the matrix
d. The number of gray shades that a pixel can produce ** Answ** b. The number of
pixels in the rows and columns
Digital mammography units often use ________ as the target material.
a. Tungsten
b. Rhodium
c. Molybdenum
d. Aluminum ** Answ** a. Tungsten
, Scintillators are used to convert:
a. X-rays to light
b. X-rays to electrons
c. Light to electrons
d. Electrons to light ** Answ** a. X-rays to light
The repeat rate should be analyzed if the rate changes from the previous measure rate
by more than:
a. +/- 2
b. +/- 3
c. +/- 4
d. +/- 5 ** Answ** a. +/- 2
In the low kVp range using a molybdenum target tube, what type of photon interaction
predominates?
a. Photoelectric
b. Compton
c. Bremsstrahlung
d. Coherent ** Answ** a. Photoelectric
Grids with strips that are linear but slanted to match the divergence of the x-ray beam
are ____ grids.
a. Parallel
b. Crossed
c. Focused
d. Moving ** Answ** c. Focused
What does the actual focal spot size measure?
a. The area on the anode exposed to electrons
