OHIO GXMO CORE MAIN QUESTIONS AND
ANSWERS SET A+
✔✔Higher kVp would do what to the penetration? - ✔✔Increase penetration
✔✔Higher kVp should be used for what type of body parts? - ✔✔Larger or more dense
body parts
✔✔The pyrex class envelope of the x-ray tube supports what? - ✔✔Electrodes and
maintains a vacuum
✔✔What does filtration do? - ✔✔Removes low energy x-ray photons from the x-ray
beam that cause unnecessary patient expsoure
✔✔Radiation scatter production is increased when? - ✔✔The collimator is wide open,
the kVp is too high, or the body part is to thick
✔✔Quality of the beam is? - ✔✔kVp
✔✔Directly proportional to the quantity of the x-ray beam? - ✔✔mAs
✔✔The focal spot size may effect the? - ✔✔Sharpness of the image
✔✔AEC - ✔✔Requires accurate positioning, require use of bucky, provides consistent
radiographic density
✔✔Using 200 mA at 0.25 sec results in an mA value of? - ✔✔50 mAs
✔✔SID - ✔✔Inversely related to image density and beam intensity
✔✔mA and time - ✔✔together determine the total quantity of radiation produced and
has a directly proportional relationship to image density
, ✔✔What would you increase by 15% to double image density? - ✔✔kVp
✔✔What is the primary factor to control image contrast? - ✔✔kVp
✔✔What would you decrease to decrease the penetrating ability? - ✔✔kVp
✔✔Increasing the SID will result in? - ✔✔A lower patient dose
✔✔What factor is usually standardized and does not vary from pt to pt? - ✔✔SID
✔✔What would you decrease to help minimize pt motion that causes a blur on the
image? - ✔✔time
✔✔What would you double to get double radiographic intensity? - ✔✔mA and time
✔✔What would you double to get 1/4 radiographic intensity? - ✔✔SID
✔✔What is contrast? - ✔✔The difference in density between adjacent areas of the
image
✔✔What is the overall "blackness" of the image? - ✔✔Density
✔✔What is a misrepresentation of the true shape of an object? - ✔✔Shape distortion
✔✔What is image clarity of the ability to visualize small structures? - ✔✔Detail
✔✔Primarily controlled by kVp - ✔✔Contrast
✔✔Primarily controlled by mAs - ✔✔Density
✔✔What is decreased when increasing the SID? - ✔✔Size distortion (magnification)
and shape distortion
✔✔What is increased when increasing the SID? - ✔✔Detail
✔✔What is increased by angulation of the body part? - ✔✔Shape distortion
✔✔What is increased by angulation of the central ray? - ✔✔Shape distortion
✔✔What is decreased by using larger focal spot size? - ✔✔Detail
✔✔What is decreased by increased patient motion? - ✔✔Detail
ANSWERS SET A+
✔✔Higher kVp would do what to the penetration? - ✔✔Increase penetration
✔✔Higher kVp should be used for what type of body parts? - ✔✔Larger or more dense
body parts
✔✔The pyrex class envelope of the x-ray tube supports what? - ✔✔Electrodes and
maintains a vacuum
✔✔What does filtration do? - ✔✔Removes low energy x-ray photons from the x-ray
beam that cause unnecessary patient expsoure
✔✔Radiation scatter production is increased when? - ✔✔The collimator is wide open,
the kVp is too high, or the body part is to thick
✔✔Quality of the beam is? - ✔✔kVp
✔✔Directly proportional to the quantity of the x-ray beam? - ✔✔mAs
✔✔The focal spot size may effect the? - ✔✔Sharpness of the image
✔✔AEC - ✔✔Requires accurate positioning, require use of bucky, provides consistent
radiographic density
✔✔Using 200 mA at 0.25 sec results in an mA value of? - ✔✔50 mAs
✔✔SID - ✔✔Inversely related to image density and beam intensity
✔✔mA and time - ✔✔together determine the total quantity of radiation produced and
has a directly proportional relationship to image density
, ✔✔What would you increase by 15% to double image density? - ✔✔kVp
✔✔What is the primary factor to control image contrast? - ✔✔kVp
✔✔What would you decrease to decrease the penetrating ability? - ✔✔kVp
✔✔Increasing the SID will result in? - ✔✔A lower patient dose
✔✔What factor is usually standardized and does not vary from pt to pt? - ✔✔SID
✔✔What would you decrease to help minimize pt motion that causes a blur on the
image? - ✔✔time
✔✔What would you double to get double radiographic intensity? - ✔✔mA and time
✔✔What would you double to get 1/4 radiographic intensity? - ✔✔SID
✔✔What is contrast? - ✔✔The difference in density between adjacent areas of the
image
✔✔What is the overall "blackness" of the image? - ✔✔Density
✔✔What is a misrepresentation of the true shape of an object? - ✔✔Shape distortion
✔✔What is image clarity of the ability to visualize small structures? - ✔✔Detail
✔✔Primarily controlled by kVp - ✔✔Contrast
✔✔Primarily controlled by mAs - ✔✔Density
✔✔What is decreased when increasing the SID? - ✔✔Size distortion (magnification)
and shape distortion
✔✔What is increased when increasing the SID? - ✔✔Detail
✔✔What is increased by angulation of the body part? - ✔✔Shape distortion
✔✔What is increased by angulation of the central ray? - ✔✔Shape distortion
✔✔What is decreased by using larger focal spot size? - ✔✔Detail
✔✔What is decreased by increased patient motion? - ✔✔Detail
