Radiation protection l Oral radiology 4th year MCQs for dental students

 Radiation protection l Oral radiology 4th year MCQs for dental students

MCQ on radiation protection for dental x-ray

Who has an ethical responsibility to adopt ALARA?

a. The dental assistant

b. The dental hygienist

c. The dentist

d. All of the above

Based on the selection criteria guidelines, what is the radiographic recommendation for bitewing radiographs on an adult recall patient with no clinical caries and no high-risk factors for caries?

a. Every 6–12 months

b. Every 12–18 months

c. Every 18–24 months

d. Every 24–36 months

Communication, working knowledge of a quality radiographic image, and education all aid in protecting the patient against unnecessary radiation exposure by

a. using lower exposure factors.

b. reducing the risk of retake radiographs.

c. collimating and filtering the primary beam.

d. creating a longer target–surface distance.

What is the minimum total filtration that is required by an x-ray machine that can operate in ranges above 70kVp?

a. 1.5 mm of aluminum equivalent

b. 1.5 mm of lead equivalent

c. 2.5 mm of aluminum equivalent

d. 2.5 mm of lead equivalent

What is the federally mandated size of the diameter of the primary beam at the end of the PID (at the skin of the patient’s face)?

a. 1.75 in. (4.5 cm)

b. 2.75 in. (7 cm)

c. 3.75 in. (10 cm)

d. 4.75 in. (12 cm)

The substance most commonly used for protection against X-ray radiation is

a) zinc

b) Steel

c) Lead

d) porcelain

in intra oral radiograph patient radiation is decreased by all except

a) High speed film

b) Intensifying screens

c) Lead apron

d) Decreasing KVP

Ideal position for dentist to stand white taking radiographs

a) Behind head of patient 1

b) At an angle of 90-135 degrees and six feet away from patient

c) In 11'0 clock position

d) At an angle of 180° and 9 feet away

The single most effective method of reducing patient somatic exposure when taking radiograph is to use

a) A lead apron

b) Speed E film

c) Added filtration

d) An open ended, shielded cone

the operator should stand at a distance of while taking X-rays

a) 6 feet

b) 8 feet

c) 10 feet

d) 2 meters

Radiation protection from secondary radiation may be increased by the use of an aluminum filter and a lead collimator because the filter regulates the size of the tissue area that is exposed and the collimator prevent slow-energy radiation from reaching the tissue

a. Both statement and reason are correct.

b. Both statement and reason are NOT correct.

c. The statement is correct, but the reason is NOT correct.

d. The statement is NOT correct, but the reason is correct.

Which of the following exposes the patient to less radiation?

a. 8 in. (20.5 cm) round PID

b. 12 in. (30 cm) round PID

c. 16 in. (41 cm) round PID

d. 16 in. (41 cm) rectangular PID

Which of the following contributes the most to reducing patient radiation exposure?

a. D speed film

b. E speed film

c. F speed film

Each of the following aids in reducing patient radiation exposure EXCEPT one. Which one is the EXCEPTION?

a. Slow-speed film

b. Careful film handling

c. Darkroom protocol

d. Image receptor holders

If a protective barrier is not present, what is the recommended minimum distance that the operator should stand from the source of the radiation?

a. 3 ft (0.91 m)

b. 6 ft (1.83 m)

c. 9 ft (2.74m)

d. 12 ft (3.66m)

The annual maximum permissible whole-body dose for oral health care personnel is

a. 0.5 mSv.

b. 5.0 mSv.

c. 50 mSv.

d. 500 mSv.

The annual maximum permissible whole-body dose for the general public is

a. 0.5 mSv.

b. 5.0 mSv.

c. 50 mSv.

d. 500 mSv.

Which of the following is a principle of radiation protection?

a. X-ray beam should be collimated.

b. Longest focus to film distance should be used.

c. Filtration should be used.

d. All of the above.