RTBC - PRIMARY EXPOSURE FACTORS
1. mA in the x-ray tube is the unit of measure describing: Tube current
2. Which of the following describes the x-ray tube current: Quantity of
electron flow
3. Which of the following statements describes the relationship
between mA and beam intensity: Beam intensity is directly proportional to the mA
4. How is the x-ray beam changed when mA is increased by a factor of
2: Beam quantity increases by a factor of two
5. Which of the following with double the quantity of photons in
the x-ray beam? select two: - double the exposure time, but do not change the
mA
-double the mA but do not change the exposure time
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, 6. Which of the following statements describes the relationship
between mA and receptor exposure: Receptor exposure is directly proportional to
the mA
7. Which of the following statements describes the relationship
between mA and patient dose: Patient dose is directly proportional to the mA
8. Increasing mA result, in which of the following: Increased beam
quantity
9. To reduce the patient those by half what must be done to the mA
if all other factors are held constant: Reduce mA by half
10. An x-ray is taken using 200mA at 0.50 seconds and results in
0.10 mGy of patient exposure. Assuming that all other factors
remain constant, which mA settings would result in a patient
exposure of 0.20 mGy?: 400mA
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9
1. mA in the x-ray tube is the unit of measure describing: Tube current
2. Which of the following describes the x-ray tube current: Quantity of
electron flow
3. Which of the following statements describes the relationship
between mA and beam intensity: Beam intensity is directly proportional to the mA
4. How is the x-ray beam changed when mA is increased by a factor of
2: Beam quantity increases by a factor of two
5. Which of the following with double the quantity of photons in
the x-ray beam? select two: - double the exposure time, but do not change the
mA
-double the mA but do not change the exposure time
1/
9
, 6. Which of the following statements describes the relationship
between mA and receptor exposure: Receptor exposure is directly proportional to
the mA
7. Which of the following statements describes the relationship
between mA and patient dose: Patient dose is directly proportional to the mA
8. Increasing mA result, in which of the following: Increased beam
quantity
9. To reduce the patient those by half what must be done to the mA
if all other factors are held constant: Reduce mA by half
10. An x-ray is taken using 200mA at 0.50 seconds and results in
0.10 mGy of patient exposure. Assuming that all other factors
remain constant, which mA settings would result in a patient
exposure of 0.20 mGy?: 400mA
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