Radiology Questions
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What is the equivalent dose limits for the hands of a technologist?A. 50 mSv ( 5 rem)/yearB. 250 mSv (25 rem)/yearC. 500 mSv (50 rem)/yearD. 750 mSv (75 rem)/year
Leakage radiation from the x-ray tube cannot exceed which of the following at a distance of one meter?A. 6.45 x 10-6 Coulomb/kg/hr (25 mR/hr)B. 1.29 x 10-5 Coulomb/kg/hr (50 mR/hr)C. 1.94 x 10-5 Coulomb/kg/hr (75 mR/hr)D. 2.58 x 10-5 Coulomb/kg/hr (100 mR/hr)
Which of the following is a primary factor in protecting radiographers from scatter radiation?A. Increase kVpB. Reduce focal spot sizeC. Use some type of lead shieldingD. Reduce screen speed
Which of the following individuals should be asked to help hold an uncooperative child?A. StudentB. TransporterC. TechnologistD. Parent
Which of the following devices alerts the radiologist that 5 minutes of fluoroscopy has elapsed?A. PhototimerB. Cumulative timerC. Synchronous timerD. Mechanical timer
What is the effective dose limit a radiation worker can receive in any one quarter (13 weeks) of a year?A. 10 mSv (1 rem)B. 30 mSv (3 rem)C. 50 mSv (5 rem)D. 70 mSv (7 rem)
During fluoroscopy, which of the following will produce the greatest amount of scatter radiation?A. Tube housingB. Table topC. PatientD. Image intensifier
How far must a radiographer stand back during a portable (mobile) radiographic exposure?A. 1 meterB. 2 metersC. 3 metersD. 4 meters
Which of the following is recommended for the pregnant radiographer?1. Do not hold patients2. Wear a wraparound apron during fluoroscopic examinations3. Wear a second radiation monitor at waist level to monitor fetal dose4. All of the above
Personnel monitoring is required when there is any likelihood that an individual will receive more than _______ the effective dose limit.A. 1/2B. 1/6C. 1/10D. 1/24
What is the exposure rate if 75 mAs results in an exposure of 600 mR?A. 6 mR/mAsB. 8 mR/mAsC. 60 mR/mAsD. 80 mR/mAs
What is the effective dose limit for the whole body of a radiation worker?A. 50 mSv ( 5 rem)/yearB. 250 mSv (25 rem)/yearC. 500 mSv (50 rem)/yearD. 750 mSv (75 rem)/year
Which of the following definitions describes equivalent dose limits?A. The maximum dose a body can tolerateB. A dose that is not expected to produce significant effectsC. The dose a worker will receive/yearD. The maximum dose a radiation monitor records
A secondary barrier protects the technologist from which of the following types of radiation?A. Stem radiationB. Primary radiationC. Scatter radiationD. Gamma radiation
What must the lead equivalency be for a lead apron?A. .25 mm PbB. .50 mm PbC. 2.5 mm PbD. 5.0 mm Pb
A radiographer will receive most of his/her occupational exposure from which of these types of radiation?A. Primary radiationB. Scatter radiationC. Remnant (exit) radiationD. Gamma radiation
During fluoroscopy, where is an acceptable position for the radiographer to stand?A. In the room, next to the patientB. In the room, next to the radiologistC. In the room, as far from the patient as practicalD. Holding the patient
Radiation workers are monitored for radiation exposure by which of the following means?A. Chest X-rayB. Radiation monitorC. Complete blood count (CBC)D. Gamma camera
How much is radiation exposure reduced if the distance between the patient and technologist is doubled?A. 2 times lessB. 4 times lessC. 6 times lessD. 8 times less
Which of the following describes a primary protective barrier?A. A lead apronB. A barrier to absorb primary radiationC. A barrier to absorb scatter radiationD. A barrier to absorb leakage radiation