NVCC RAD 105 Final {California Fluoroscopy} Comprehensive Resource To Help You Ace Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attempt!! Current Update!!

NVCC RAD 105 Final {California Fluoroscopy}

Comprehensive Resource To Help You Ace
2026-2027 Includes Frequently Tested
Questions With ELABORATED 100% Correct
COMPLETE SOLUTIONS

Guaranteed Pass First Attempt!!

Current Update!!



1. It is known the intensity of radiation varies inversely to the square of the
distance. As one moves away from the source of scatter radiation, they will
receive less radiation dose because _
1. the air gap has a tendency to absorb some intensity
2. the scattered photons are much lower in energy
3. the photons are scattered in opposite directions

4. the scattered photons will diverge from the source tissues - ANSWER 1. the
scattered photons are much lower in energy


2. Which of the following will decrease the integral patient dose without
decreasing image brightness
1. decreasing the x-ray field size
2. increase the distance of the image intensifier tube to the patient
3. increasing the kVp

,4. decreasing the TPD (target to panel distance) - ANSWER 4. decreasing the
TPD


3. Mobile image intensified fluoroscopy used for diagnostic purposes must not
exceed _ as measured at 30 cm from the input surface of the fluoroscopic
assembly
1. 10 R/min ( 44 m/Gy per min.)
2. 1 R/min (mGy per min.)
3. 3 R/min (0.5m/Gy per min.)

4. 5 R/min (44 m/Gy per min.) - ANSWER 5 R/min (44 m/Gy per min.)


4. Which of the following contributes to the "total" filtration of the useful x-ray
beam
1. added filtration
2. inherent filtration
3. xray tube, table, and grid

d. 2 only - ANSWER c. 1,2 and 3


5. When performing a fluoroscopic procedure, the primary source of scattered
radiation is emitted from the:
1. patient
2. table top
3. leakage radiation

4. xray source - ANSWER 1. patient

,6. The time it takes a fully energized x-ray tube to return to a non- energized state
is termed the _time
1. interrogation
2. extinction
3. radiographic

4. acquisition - ANSWER 2. extinction


7. A fluoroscopy system using a dynamic flat panel image receptor as compared to
conventional fluoroscopy requires
1. higher tube potential
2. higher x-ray tube current
3. lower x-ray tube current

4. higher capacity x-ray tubes - ANSWER 2. higher x-ray tube current


8. Which of the following is considered to be the "primary" radiation beam?
1. scatter radiation
2. leakage radiation
3. useful beam

d. all of the above - ANSWER 3. useful beam


9. What happens in the image intensification tube when magnification mode is
activated?
1. the electron stream is further compressed

, 2. available input surface area being utilized is reduced
3. the electrostatic lens voltage is increased
4. electron crossover point moves further away from the input phosphor -
ANSWER 1. the electron stream is further compressed

2. available input surface area being utilized is reduced


10. According to CA state regulations, using a fluoroscope to position patients
prior to taking a routine radio graphic film is
1. prohibited by law
2. generally acceptable
3. up the licentiate's discretion

4. acceptable under certain conditions - ANSWER 1. prohibited by law


11. If an occupational worker receives 500 millirem on a film badge report, this
will most likely indicate?
1. poor work habits
2. the worker is wearing the film badge in the wrong place
3. a wrong reading

4. all of the above - ANSWER 1. poor work habits


12. In a fluoroscopy system which utilizes a selenium panel detection system, the
_ converts x-ray energy into free electrons
1. scintillator
2. photo detector