Fluoroscopy Exam Questions With Complete Solutions
How can quantum mottle be reduced? Correct Answers
Increase mA
How is beam quality (filtration check) tested? Correct Answers
Testing involves different exposures with different aluminum
plates.
How is distortion tested? Correct Answers Mesh tool (different
amount of holes in each panel)
How is image lag tested? Correct Answers *-*Testing involves
imaging a metal washer and homogenous phantom under
fluoroscopy while moving image intensifier back and forth
*-*Viewing the image of a rotating test tool, the radioscopic
system should be able to visualize a wire of diameter *0.013
inch or smaller.* (SC35)
How is kVp accuracy tested? appropriate levels SC35 and
HARP? Correct Answers *-*Exposing kVp meter under fluoro
*-*The two kVp values should coincide within:
*SC35* : 10%
*Harp*: 8%
How is MA linearity test actually tested? Correct Answers
Series of fluoro exposures, each 2 times the MA from the last
How often do you check mAs linearity for HARP? Correct
Answers Semi annual
, If the unit is an under table radioscopic system, what should you
check (related to cassette holder) Correct Answers Check that
the shield covering cassette holder entrance is set up and
working
Maximum Air Kerma Rate of Radioscopic Equipment Correct
Answers Radioscopic equipment, other than when recording
images, must not operate at any combination of X-ray tube
voltage and X-ray tube current that results in an air kerma rate
that exceeds
*-50 mGy/min when the equipment is not fitted with an
automatic intensity control*
*-100 mGy/min when the equipment is fitted with an automatic
intensity control*
*-150 mGy/min when the equipment is fitted with both an
automatic intensity control and a high-level irradiation control
when the latter is activated*
Maximum Entrance Exposure Rate Correct Answers *-
*Measured in either *R/min* or *mCkg-1/kg*
*-*Testing involves exposing a radiation detector under fluoro
*-*The intensity of the x-ray beam when it enters the patient
should not exceed *10 R/min (2.6 mCkg-1/min)* (HARP)
Response Function Correct Answers The manufacturer
specified relationship between the system response
Three main components of qc for equipment Correct Answers
*-*Visual inspection
*_*Environmental inspection
*-*Performance testing
How can quantum mottle be reduced? Correct Answers
Increase mA
How is beam quality (filtration check) tested? Correct Answers
Testing involves different exposures with different aluminum
plates.
How is distortion tested? Correct Answers Mesh tool (different
amount of holes in each panel)
How is image lag tested? Correct Answers *-*Testing involves
imaging a metal washer and homogenous phantom under
fluoroscopy while moving image intensifier back and forth
*-*Viewing the image of a rotating test tool, the radioscopic
system should be able to visualize a wire of diameter *0.013
inch or smaller.* (SC35)
How is kVp accuracy tested? appropriate levels SC35 and
HARP? Correct Answers *-*Exposing kVp meter under fluoro
*-*The two kVp values should coincide within:
*SC35* : 10%
*Harp*: 8%
How is MA linearity test actually tested? Correct Answers
Series of fluoro exposures, each 2 times the MA from the last
How often do you check mAs linearity for HARP? Correct
Answers Semi annual
, If the unit is an under table radioscopic system, what should you
check (related to cassette holder) Correct Answers Check that
the shield covering cassette holder entrance is set up and
working
Maximum Air Kerma Rate of Radioscopic Equipment Correct
Answers Radioscopic equipment, other than when recording
images, must not operate at any combination of X-ray tube
voltage and X-ray tube current that results in an air kerma rate
that exceeds
*-50 mGy/min when the equipment is not fitted with an
automatic intensity control*
*-100 mGy/min when the equipment is fitted with an automatic
intensity control*
*-150 mGy/min when the equipment is fitted with both an
automatic intensity control and a high-level irradiation control
when the latter is activated*
Maximum Entrance Exposure Rate Correct Answers *-
*Measured in either *R/min* or *mCkg-1/kg*
*-*Testing involves exposing a radiation detector under fluoro
*-*The intensity of the x-ray beam when it enters the patient
should not exceed *10 R/min (2.6 mCkg-1/min)* (HARP)
Response Function Correct Answers The manufacturer
specified relationship between the system response
Three main components of qc for equipment Correct Answers
*-*Visual inspection
*_*Environmental inspection
*-*Performance testing
