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CAMRT EXAM 2024/2025 WITH QUESTIONS AND CORRECT ANSWERS || EXAM GRADED A+
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CAMRT EXAM 2024/2025 WITH QUESTIONS AND CORRECT ANSWERS || EXAM GRADED A+
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CAMRT EXAM 2024/2025 WITH QUESTIONS ANDCORRECT ANSWERS || EXAM GRADED A+
How far away must the operator stand from the xray tube if not covered
with lead? - CORRECT ANSWER : 3 meters
90% of man made radiation to the population is related to? -
CORRECT ANSWER : Medical Radiography and Dental
For each peak xray voltage, what lead equivalent is required?
100kV or less (o-100)
Between 101kV-149kV
150kV or greater (150+) - CORRECT ANSWER : 0-100kV = 0.25mm
of lead
Greater than 100kV but less then 150kV = 0.35mm of lead
150kV or greater = 0.50mm of lead
What protective equipment is required during interventional procedures
- CORRECT ANSWER : Full wrap around protective gowns of
0.50mm pb in the front panels and 0.25mm pb in the back 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 protective gloves/ gauntlets possess? -
CORRECT ANSWER : 0.25mm of pb
What lead equivalent must ceiling mounted lead screens and moveable
shields provide? - CORRECT ANSWER : 0.50mm of pb
What are the annual radiation dose limits for radiation workers? -
CORRECT ANSWER : Whole body= 20mSv
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 limits to members of the public? -
CORRECT ANSWER : Whole body = 1mSv
Lens of the eye= 15mSv
Skin = 50mSv
,Hands = 50mSv
All other organs = 50mSv
*these also apply for students*
What are primary protective barriers? Give examples - CORRECT
ANSWER : Primary barriers provide shielding from the direct 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 give examples - CORRECT
ANSWER : Provide shielding against both leakage and 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 distance be for:
-Mobile equipment
-Stationary equipment
, -Radioscopic equipment - CORRECT ANSWER : Must not be less
than:
-Mobile: 30cm
-Stationary: 38cm
-Radioscopic: 20cm (designed for special procedures that would be
impossible at 30cm or 38cm)
What are the maximum air kerma rates for radioscopic equipment:
-with automatic intensity control
-without AIC - CORRECT ANSWER : Not equipped with AIC:
50mGy/min
With AIC: 100mGy/min
The air kerma rate must not exceed ___ from scattered radiation of
radioscopic equipment - CORRECT ANSWER : 2 mGy/h
HVL of Aluminum for given tube voltages? (70kV-150kV) -
CORRECT ANSWER : 70: 2.5mm
80: 2.9mm
90: 3.2mm
100: 3.6mm
110: 3.9mm
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