ARRT Radiography Exam Quiz: Use Radiation Protective Devices

What this quiz covers

This quiz focuses on Use Radiation Protective Devices, giving you a quick way to practice the rules, question types, and explanations that matter most for ARRT Radiography Exam.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. A ring badge is indicated only when a fluoroscopy worker's collar badge exceeds 50% of the annual occupational limit; it is a secondary monitoring tool triggered by collar badge readings.
2. A ring badge is worn only during procedures involving radioactive isotopes; x-ray fluoroscopy does not generate sufficient extremity dose to require ring dosimetry.
3. A ring badge is indicated when hands are near the primary beam during fluoroscopy and should be worn on the finger closest to the source, with the dosimeter element on the palmar surface to measure extremity dose accurately. (correct answer)
4. The ring badge should be worn on the finger of the non-dominant hand; the non-dominant hand is always the hand at greatest risk during fluoroscopy because it holds the patient while the dominant hand operates equipment away from the beam.

Question 2

1. Standard 0.25 mm lead equivalency apron with thyroid shield, since pregnancy does not require additional protection beyond normal safety measures
2. Lightweight 0.25 mm lead apron without thyroid shield to prevent excessive weight that could harm the pregnancy
3. Two overlapping 0.25 mm lead aprons (front and back) with thyroid shield to provide 0.5 mm protection while distributing weight
4. Wraparound 0.5 mm lead equivalency apron with thyroid shield and leaded eyewear to ensure maximum protection during high-exposure procedures (correct answer)

Question 3

1. Remain in the control booth throughout the procedure and use remote controls for table movements and patient instructions
2. Position the mobile shield between the patient and image intensifier to reduce scatter radiation to the radiographer
3. Wear personal protective equipment and utilize the ceiling-mounted shield when tableside assistance is required during fluoroscopy (correct answer)
4. Use only personal protective equipment since mobile shields interfere with necessary patient care activities during fluoroscopy

Question 4

1. Use a large flat contact shield positioned to cover the entire pelvic region, ensuring complete gonadal protection even if some bony anatomy is obscured
2. Utilize a shadow shield positioned to protect the gonads without patient contact, maintaining sterile field if surgical intervention is anticipated
3. Position a contact shield to cover the gonads while ensuring the symphysis pubis and sacroiliac joints remain visible for diagnostic evaluation (correct answer)
4. Omit gonadal shielding since the patient's age and cooperation allow for precise collimation that adequately limits radiation exposure

Question 5

1. Use the largest available flat contact shield to ensure complete gonadal coverage even if it extends beyond the anatomy of interest
2. Select a shaped contact shield that conforms to the patient's anatomy and covers the gonads without obscuring the hip joint spaces (correct answer)
3. Position a shadow shield to project just medial to the femoral heads, ensuring no overlap with bony anatomy
4. Avoid shielding entirely since the small patient size results in minimal gonadal dose from hip examinations

Question 6

1. Continue using the apron until the next scheduled inspection since surface cracks do not necessarily indicate internal lead damage
2. Mark the damaged area and position the apron so the cracks are not between the radiation source and the body during use
3. Use the apron only for low-exposure procedures such as routine radiography, avoiding fluoroscopic examinations
4. Remove the apron from service immediately and select an appropriately sized replacement from available equipment (correct answer)

Question 7

1. Wear the lead apron over the isolation gown and gloves, then dispose of all infection control equipment after the examination (correct answer)
2. Wear the isolation gown over the lead apron to prevent contamination of the radiation protection equipment, changing gloves between positioning and exposure
3. Use only infection control protective equipment since the radiation exposure from a single mobile examination is minimal
4. Wear isolation equipment for positioning, remove it before making the exposure while wearing the lead apron, then re-gown for any additional patient contact

Question 8

1. Stand behind the stationary lead barrier and use the remote fluoroscopic controls exclusively throughout the procedure
2. Wear a lead apron and thyroid shield while positioning behind the mobile lead shield when close patient contact is required (correct answer)
3. Utilize only personal protective equipment since barrier shielding restricts necessary patient care activities
4. Position behind the stationary barrier during fluoroscopy and remove all protective equipment during spot filming

Question 9

1. Ask family members to step outside the room since they are not essential personnel and the cross-table technique increases scatter radiation (correct answer)
2. Position family members at least 6 feet from the patient and provide lead aprons if they insist on remaining in the room
3. Allow family members to remain at the patient's bedside without protection since they are not directly in the primary beam path
4. Provide lead aprons and position family members behind the x-ray tube since this area has the lowest radiation exposure

Question 10

1. Allow the mother to hold the infant while wearing a lead apron with thyroid shield and position her lateral to the primary beam (correct answer)
2. Request that a hospital employee hold the infant instead, as family members should never be exposed to radiation
3. Use mechanical restraining devices exclusively and perform the examination without human assistance
4. Allow the mother to hold the infant without protective equipment since the exposure time will be very brief

Question 11

1. The physician should wear a standard lead apron since medical personnel have higher radiation exposure limits than the general public
2. Position the physician perpendicular to the central ray direction and ensure the lead apron covers from thyroid to gonads (correct answer)
3. The physician should stand directly behind the image receptor to minimize distance from the x-ray tube while providing arm traction
4. Use a mobile lead shield between the physician and x-ray tube rather than personal protective equipment to avoid interference with patient care

Question 12

1. Added filtration increases image contrast by removing high-energy photons; the filtered beam has lower average energy that produces better differential absorption between tissues.
2. Added filtration removes low-energy photons, reducing patient skin dose and increasing beam energy for better penetration, thus enhancing patient safety by minimizing non-imaging radiation exposure. (correct answer)
3. Added filtration reduces image contrast by removing low-energy photons that produce the photoelectric interactions responsible for differential tissue absorption.
4. Added filtration is used to increase the quantity of x-ray photons reaching the patient; more photons per exposure means each individual photon can have lower energy, reducing dose per photon.

Question 13

1. Thyroid collars are needed only for radiographers who perform more than 100 fluoroscopy procedures per month; below this threshold, thyroid dose is clinically negligible.
2. Thyroid collars shield against scatter radiation during fluoroscopy; they must be 0.5 mm Pb equivalent and fit snugly around the neck, supplementing the lead apron. (correct answer)
3. Thyroid collars are optional; they are only required by regulation for nuclear medicine workers, not for diagnostic radiography personnel.
4. The thyroid collar protects only against primary beam exposure; scatter radiation penetrates the collar at all angles and provides no meaningful attenuation of scattered x-rays.

Question 14

1. OSL dosimeters are superior to TLD because they can be read multiple times without erasing the dose information, allowing for verification and assessment of different radiation types or energies. (correct answer)
2. OSL dosimeters are superior to TLD because they provide real-time dose display on an integrated LCD screen; radiographers can check their accumulated dose at any time during a shift
3. OSL dosimeters are superior to TLD because they use no physical materials; they rely entirely on electronic dose integration through a semiconductor chip with no risk of material degradation
4. OSL dosimeters require no laboratory processing; the worker inserts the badge into a small desktop reader in the department to obtain their dose reading within seconds

Question 15

1. Gonadal shielding is always required for female patients of reproductive age regardless of the examination; the potential for genetic harm outweighs any diagnostic concern.
2. Gonadal shielding is not applicable to trauma patients; hospital policy exempts trauma radiography from radiation protection requirements to prioritize speed.
3. The gonadal shielding decision is irrelevant because the fractures will produce so much additional scatter that any dose reduction from a shield is negligible.
4. Gonadal shielding obscures critical anatomy needed for fracture assessment, potentially leading to repeat exposures and increased radiation dose, making it inappropriate for this examination. (correct answer)

Question 16

1. The fetal dosimeter is worn under the lead apron at waist level to accurately measure the attenuated dose reaching the fetus, ensuring compliance with the gestational dose limit of 5 mSv, without replacing the standard collar dosimeter. (correct answer)
2. The fetal dosimeter replaces the standard collar dosimeter during pregnancy; pregnant workers wear only the fetal dosimeter placed at the collar to maintain the standard monitoring position.
3. The fetal dosimeter is worn outside clothing over the lead apron at the abdominal level; wearing it over the apron records the ambient scatter dose in the room environment and provides a conservative overestimate to ensure the fetal limit is never underreported.
4. The fetal dosimeter should be worn at shoulder level; the shoulder is the point most exposed to scatter in a fluoroscopy environment and provides the best estimate of total body scatter dose.

Question 17

1. Gonadal shielding should be applied to every patient regardless of age, sex, or examination; universal application ensures no patient is unprotected.
2. Gonadal shielding is indicated only for male patients, as the external location of the testes makes shielding practical; female patients should not receive gonadal shielding because the ovaries cannot be reliably shielded.
3. Gonadal shielding is most appropriately applied when three conditions are simultaneously met: (1) the patient is of reproductive age (generally birth through approximately 50 years), as radiosensitive germ cells make genetic radiation effects a concern in this age group; (2) the gonads are in or within approximately 5 cm of the primary radiation field, since shielding gonads that are far from the beam provides minimal dose benefit; (3) the shielded area would NOT obscure diagnostically essential anatomy, because gonadal shielding that covers structures required for diagnosis defeats the examination's clinical purpose and may require a repeat that delivers more dose than the shield would have saved; for male patients, shielding is consistently achievable for AP and lateral pelvis and lumbar projections; for female patients, ovarian shielding is more anatomically challenging for AP pelvic projections specifically. (correct answer)
4. Gonadal shielding criteria require only that the patient is under age 18; adult patients of reproductive age do not require gonadal shielding per NCRP guidelines.