QUALITY CONTROL TEST QUESTIONS & ANSWERS
Which of the following is one of the objectives of a QA program in Medical Imaging? -
Answers - Ensure high quality services
QC in diagnostic imaging deals with - Answers - Equipment
SC 35 is published by - Answers - Health Canada - federal
The minimum safety & performance standards expected of all medical x-ray equipment
used in Canadian facilities are laid out by - Answers - Regulatory Acts
The associated QC procedures for medical x-ray equipment are described by - Answers
- Health Canada in the Safety Code
The exposure timer is # ______; and the kV selector is # ______. These are both
located on the ______ side of the x-ray generator circuit. - Answers - 4; 3; primary -
anything connected to control panel has to be low voltage in case of shock to the
operator
Radiation output is a measure of beam - Answers - quantity
Radiation output reproducibility and linearity must be tested - Answers - Annually
The term linearity means the radiation output will - Answers - increase sequentially with
the same sequential increase in mA, time or mAs
According to SC 35, for any ten consecutive measurements taken at the same control
panel settings within 1 hour of each other, the coefficient of variation should not exceed:
(we looked at the percent variation not the coefficient) - Answers - 0.05 (5% fluctuation
is allowed)
The mA selector is located in the - Answers - filament circuit - quantity of photons in x-
ray beam
Half-value layer (HVL) is a measure of beam - Answers - filtration
X-Ray beam filtration must be tested - Answers - Annually
Where the x-ray tube voltage is 50 kV or more, the current-time product must not
exceed - Answers - mAs per irradiation 600
The accuracy of tube loading factors must be tested - Answers - Annually - qc
technologist
, The term reproducibility means the radiation output - Answers - is consistent from one
exposure to the next - synonym is reliability
According to SC 35, for any combination of loading factors, the ______ must not deviate
from the selected value by more than _____. - Answers - i.kVp; ___10___ %. ii. time;
__10____ % + 1 ms. iii. mA; ___20___ %. iv. mAs; ____10__ % + 0.2 mAs.
The safety code specifies the _______ half-value layer of aluminum for given tube
voltages. - Answers - minimum
According to SC 35, the x-ray tube shielding must be such that the ______ radiation
from the x-ray source assembly shall not exceed an air kerma rate of ____ mGy/h at a
distance of 1 m away from the focal spot, when the tube is at maximum loading. -
Answers - leakage; 1.0
The red outline represents the - Answers - Protective housing/shielding
The life span of a storage phosphor screen (SPS) used in CR is approximately _______
exposures. - Answers - 10 000
Compared to FPD imaging, dynamic range and DQE of PSP imaging is - Answers -
lower
The light released by the stimulating laser inside the CR reader is - Answers -
monochromatic
Inside the CR reader, the IP translates along the roller mechanism in a direction that is -
Answers - perpendicular to the laser beam
Which IP size is sampled at the highest rate (greatest # of pixels/mm)? - Answers - 8x10
SC 35 recommends that a visual inspection of the physical condition of the phosphor
screen be performed - Answers - Weekly
SC 35 recommends that cleaning of the phosphor screen be performed - Answers -
Monthly
True or False: when it comes to the proper care and maintenance of the IPs and CR
reader, the manufacturers recommendations supersede SC 35 - Answers - True
If the IP is not erased sufficiently after a high exposure, and some of the phosphors still
hold their charge, the artefact that demonstrated on the subsequent image is called -
Answers - residual image artifact
Indirect Digital Radiography (i-DR) uses what type of capture element in the detector? -
Answers - Scintillator
Which of the following is one of the objectives of a QA program in Medical Imaging? -
Answers - Ensure high quality services
QC in diagnostic imaging deals with - Answers - Equipment
SC 35 is published by - Answers - Health Canada - federal
The minimum safety & performance standards expected of all medical x-ray equipment
used in Canadian facilities are laid out by - Answers - Regulatory Acts
The associated QC procedures for medical x-ray equipment are described by - Answers
- Health Canada in the Safety Code
The exposure timer is # ______; and the kV selector is # ______. These are both
located on the ______ side of the x-ray generator circuit. - Answers - 4; 3; primary -
anything connected to control panel has to be low voltage in case of shock to the
operator
Radiation output is a measure of beam - Answers - quantity
Radiation output reproducibility and linearity must be tested - Answers - Annually
The term linearity means the radiation output will - Answers - increase sequentially with
the same sequential increase in mA, time or mAs
According to SC 35, for any ten consecutive measurements taken at the same control
panel settings within 1 hour of each other, the coefficient of variation should not exceed:
(we looked at the percent variation not the coefficient) - Answers - 0.05 (5% fluctuation
is allowed)
The mA selector is located in the - Answers - filament circuit - quantity of photons in x-
ray beam
Half-value layer (HVL) is a measure of beam - Answers - filtration
X-Ray beam filtration must be tested - Answers - Annually
Where the x-ray tube voltage is 50 kV or more, the current-time product must not
exceed - Answers - mAs per irradiation 600
The accuracy of tube loading factors must be tested - Answers - Annually - qc
technologist
, The term reproducibility means the radiation output - Answers - is consistent from one
exposure to the next - synonym is reliability
According to SC 35, for any combination of loading factors, the ______ must not deviate
from the selected value by more than _____. - Answers - i.kVp; ___10___ %. ii. time;
__10____ % + 1 ms. iii. mA; ___20___ %. iv. mAs; ____10__ % + 0.2 mAs.
The safety code specifies the _______ half-value layer of aluminum for given tube
voltages. - Answers - minimum
According to SC 35, the x-ray tube shielding must be such that the ______ radiation
from the x-ray source assembly shall not exceed an air kerma rate of ____ mGy/h at a
distance of 1 m away from the focal spot, when the tube is at maximum loading. -
Answers - leakage; 1.0
The red outline represents the - Answers - Protective housing/shielding
The life span of a storage phosphor screen (SPS) used in CR is approximately _______
exposures. - Answers - 10 000
Compared to FPD imaging, dynamic range and DQE of PSP imaging is - Answers -
lower
The light released by the stimulating laser inside the CR reader is - Answers -
monochromatic
Inside the CR reader, the IP translates along the roller mechanism in a direction that is -
Answers - perpendicular to the laser beam
Which IP size is sampled at the highest rate (greatest # of pixels/mm)? - Answers - 8x10
SC 35 recommends that a visual inspection of the physical condition of the phosphor
screen be performed - Answers - Weekly
SC 35 recommends that cleaning of the phosphor screen be performed - Answers -
Monthly
True or False: when it comes to the proper care and maintenance of the IPs and CR
reader, the manufacturers recommendations supersede SC 35 - Answers - True
If the IP is not erased sufficiently after a high exposure, and some of the phosphors still
hold their charge, the artefact that demonstrated on the subsequent image is called -
Answers - residual image artifact
Indirect Digital Radiography (i-DR) uses what type of capture element in the detector? -
Answers - Scintillator
