CAMRT Exam | Questions with 100% Correct
Answers | Verified | Latest Update 2026/2027
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Terms in this set (150)
How far away must the operator 3 meters
stand from the xray tube if not
covered with lead?
90% of man made radiation to the Medical Radiography and Dental
population is related to?
For each peak xray voltage, what 0-100kV = 0.25mm of lead
lead equivalent is required?
Greater than 100kV but less then 150kV = 0.35mm of
100kV or less (o-100) lead
Between 101kV-149kV
150kV or greater (150+) 150kV or greater = 0.50mm of lead
What protective equipment is Full wrap around protective gowns of 0.50mm pb
required during interventional in the front panels and 0.25mm pb in the back
procedures panels
Thyroid shields with an equivalent of 0.50mm of pb
Lead drapes/curtains mounted to II of 0.25mm of
pb at 100kv
,What lead equivalent must 0.25mm of pb
protective gloves/ gauntlets
possess?
What lead equivalent must ceiling 0.50mm of pb
mounted lead screens and moveable
shields provide?
What are the annual radiation dose Whole body= 20mSv
limits for radiation workers? Lens of eye= 150mSv
Skin = 500mSv
Hands = 150mSv
All other organs = 500mSv
For pregnant women an effective dose of 4 mSv
must be applied for the remainder of the
pregnancy from all sources
What are the annual radiation dose Whole body = 1mSv
limits to members of the public? Lens of the eye= 15mSv
Skin = 50mSv
Hands = 50mSv
All other organs = 50mSv
these also apply for students
What are primary protective Primary barriers provide shielding from the direct
barriers? Give examples xray beam. Such as, the walls and floor where the
tube can be directed
-The wall behind the wall bucky
-Floor under the table
, What are secondary barriers and Provide shielding against both leakage and
give examples scattered radiation. Walls that the primary beam is
not directed towards and the ceiling are secondary
barriers.
The control booth is also a secondary barrier, the
primary beam should never be directed towards it.
What should the focal spot to skin Must not be less than:
distance be for:
-Mobile: 30cm
-Mobile equipment -Stationary: 38cm
-Stationary equipment -Radioscopic: 20cm (designed for special
-Radioscopic equipment procedures that would be impossible at 30cm or
38cm)
What are the maximum air kerma Not equipped with AIC: 50mGy/min
rates for radioscopic equipment:
With AIC: 100mGy/min
-with automatic intensity control
-without AIC
The air kerma rate must not exceed 2 mGy/h
___ from scattered radiation of
radioscopic equipment
HVL of Aluminum for given tube 70: 2.5mm
voltages? (70kV-150kV) 80: 2.9mm
90: 3.2mm
100: 3.6mm
110: 3.9mm
120: 4.3mm
130: 4.7mm
140: 5.0mm
150: 5.4mm
Answers | Verified | Latest Update 2026/2027
Save
Terms in this set (150)
How far away must the operator 3 meters
stand from the xray tube if not
covered with lead?
90% of man made radiation to the Medical Radiography and Dental
population is related to?
For each peak xray voltage, what 0-100kV = 0.25mm of lead
lead equivalent is required?
Greater than 100kV but less then 150kV = 0.35mm of
100kV or less (o-100) lead
Between 101kV-149kV
150kV or greater (150+) 150kV or greater = 0.50mm of lead
What protective equipment is Full wrap around protective gowns of 0.50mm pb
required during interventional in the front panels and 0.25mm pb in the back
procedures panels
Thyroid shields with an equivalent of 0.50mm of pb
Lead drapes/curtains mounted to II of 0.25mm of
pb at 100kv
,What lead equivalent must 0.25mm of pb
protective gloves/ gauntlets
possess?
What lead equivalent must ceiling 0.50mm of pb
mounted lead screens and moveable
shields provide?
What are the annual radiation dose Whole body= 20mSv
limits for radiation workers? Lens of eye= 150mSv
Skin = 500mSv
Hands = 150mSv
All other organs = 500mSv
For pregnant women an effective dose of 4 mSv
must be applied for the remainder of the
pregnancy from all sources
What are the annual radiation dose Whole body = 1mSv
limits to members of the public? Lens of the eye= 15mSv
Skin = 50mSv
Hands = 50mSv
All other organs = 50mSv
these also apply for students
What are primary protective Primary barriers provide shielding from the direct
barriers? Give examples xray beam. Such as, the walls and floor where the
tube can be directed
-The wall behind the wall bucky
-Floor under the table
, What are secondary barriers and Provide shielding against both leakage and
give examples scattered radiation. Walls that the primary beam is
not directed towards and the ceiling are secondary
barriers.
The control booth is also a secondary barrier, the
primary beam should never be directed towards it.
What should the focal spot to skin Must not be less than:
distance be for:
-Mobile: 30cm
-Mobile equipment -Stationary: 38cm
-Stationary equipment -Radioscopic: 20cm (designed for special
-Radioscopic equipment procedures that would be impossible at 30cm or
38cm)
What are the maximum air kerma Not equipped with AIC: 50mGy/min
rates for radioscopic equipment:
With AIC: 100mGy/min
-with automatic intensity control
-without AIC
The air kerma rate must not exceed 2 mGy/h
___ from scattered radiation of
radioscopic equipment
HVL of Aluminum for given tube 70: 2.5mm
voltages? (70kV-150kV) 80: 2.9mm
90: 3.2mm
100: 3.6mm
110: 3.9mm
120: 4.3mm
130: 4.7mm
140: 5.0mm
150: 5.4mm
