Lmrt core / radiation & safety Questions
with Correct Answers
What happens when mA is doubled? Correct Answ_- density increases
- twice as many photons are in xray beam
photoelectric effect occurs: Correct Answ_when incoming photon from primary beam
interacts with inner shell electron if atom in its body
What type rad is produced when incoming electron interacts with k-shell electron in tungsten
atom? Correct Answ_characteristic radiation
Higher kvp setting produces: Correct Answ_long-scale contrast
Unit that = effective dose to occupational worker in US: Correct Answ_mSv
Frequency of sine wave measured by; Correct Answ_number of times per second that a Crest
passes a given point
, Wavelength Correct Answ_Horizontal distance between the crests or between the troughs of
two adjacent waves
Elongation Correct Answ_when body part appears longer than it is
Characteristic of xray? Correct Answ_can penetrate matter
Reduce dose to limited operator by: Correct Answ_- minimize time spent in Rad area
- increase distance btwn operator and source of Rad
- use shielding
NCRP recommends monthly equivalents dose limit for PREGNANT workers: Correct
Answ_0.5 mSv
Many densities but little difference btwn the densities is: Correct Answ_low contrast
Geometric factors that affect formation of image; Correct Answ_SID
with Correct Answers
What happens when mA is doubled? Correct Answ_- density increases
- twice as many photons are in xray beam
photoelectric effect occurs: Correct Answ_when incoming photon from primary beam
interacts with inner shell electron if atom in its body
What type rad is produced when incoming electron interacts with k-shell electron in tungsten
atom? Correct Answ_characteristic radiation
Higher kvp setting produces: Correct Answ_long-scale contrast
Unit that = effective dose to occupational worker in US: Correct Answ_mSv
Frequency of sine wave measured by; Correct Answ_number of times per second that a Crest
passes a given point
, Wavelength Correct Answ_Horizontal distance between the crests or between the troughs of
two adjacent waves
Elongation Correct Answ_when body part appears longer than it is
Characteristic of xray? Correct Answ_can penetrate matter
Reduce dose to limited operator by: Correct Answ_- minimize time spent in Rad area
- increase distance btwn operator and source of Rad
- use shielding
NCRP recommends monthly equivalents dose limit for PREGNANT workers: Correct
Answ_0.5 mSv
Many densities but little difference btwn the densities is: Correct Answ_low contrast
Geometric factors that affect formation of image; Correct Answ_SID
