CAMRT EXAM CORRECTLY ANSWERED 2023//2024

CAMRT EXAM CORRECTLY ANSWERED 2023//2024 How far away must the operator stand from the xray tube if not covered with lead? - ANSWER 3 meters 90% of man made radiation to the population is related to? - 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+) - 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 - 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? - ANSWER 0.25mm of pb What lead equivalent must ceiling mounted lead screens and moveable shields provide? - ANSWER 0.50mm of pb What are the annual radiation dose limits for radiation workers? - 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? - 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 - 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 - 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 - 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 - ANSWER Not equipped with AIC: 50mGy/min With AIC: 100mGy/min The air kerma rate must not exceed ___ from scattered radiation of radioscopic equipment - ANSWER 2 mGy/