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Ohio GXMO Study Guide Review- Questions and 100% Correct Verified Answers
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Ohio GXMO Study Guide Review-Questions and 100% Correct Verified
Answers
What is a focusing cup? - Answer Propels electrons towards a specific area of the anode
target
What is the focal spot? - Answer Area of the target which electrons interact
What rotates during exposure? - Answer Anode
What does the small filament do? - Answer Provides greater image detail
The effective focal spot is smaller than the? - Answer Effective focal spot size
Radiation intensity is greater at the cathode and less at the anode end of the x-ray beam
because of the? Only significant when using entire beam (14x17 in at 40 or 72 in) -
Answer Anode Heel Effect
,Placing thinner parts under the anode portion of the x-ray beam would result in?
- Answer Uniform radiographic density
Higher kVp would do what to the penetration? - Answer Increase penetration
Higher kVp should be used for what type of body parts? - Answer Larger or more
dense body parts
The pyrex class envelope of the x-ray tube supports what? - Answer Electrodes
and maintains a vacuum
What does filtration do? - Answer Removes low energy x-ray photons from the x-
ray beam that cause unnecessary patient expsoure
Radiation scatter production is increased when? - Answer The collimator is wide open,
the kVp is too high, or the body part is to thick
Quality of the beam is? - Answer kVp
Directly proportional to the quantity of the x-ray beam? - Answer mAs
The focal spot size may effect the? - Answer Sharpness of the image
AEC - Answer Requires accurate positioning, require use of bucky, provides
consistent radiographic density
Using 200 mA at 0.25 sec results in an mA value of? - Answer 50 mAs
, SID - Answer Inversely related to image density and beam intensity
mA and time - Answer together determine the total quantity of radiation produced
and has a directly proportional relationship to image density
Who discovered x-rays? - Answer Wilhelm Conrad Roentgen
When were x-rays discovered? - Answer November 8, 1895 in Germany
What are the 3 Cardinal Principals of radiation protection? - Answer Maximize
distance, maximize shielding, minimize time
What is Erythema? - Answer Reddening of the skin
What is Anemia? - Answer Decrease of oxygen in blood, low blood count
What is Leukopenia? - Answer Low WBC count
What is epilation? - Answer Loss of hair
What does ALARA stand for? - Answer As Low As Reasonably Achievable
What is collimation? - Answer Limits the size/area of the x-ray beam
What is a proton? - Answer Positively charged, in nucleus of atom
What is a neutron? - Answer No electrical charge, in nucleus of atom
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