Test 3 X-ray Referrers

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1. Scattered radiation decreases: *

1 point

a. back towards the source with X-rays in the diagnostic radiology range;

b. with increasing field size;

c. closer to the patient;

d. using normal fluoroscopy instead of high dose rate mode;

e. with larger patient size.

2. Which statement is true? A personal dosimeter badge is worn to assess occupational exposure: *

1 point

a. at collar level under a thyroid shield;

b. and should only be worn by radiation workers who are likely to receive high radiation doses;

c. and should be worn between waist and chest level if a lead apron is not routinely worn;

d. and must be worn by anyone who might come into contact with ionising radiation;

e. but is not necessary most of the time.

3. Which statement is the best answer. The ALARA principle: *

1 point

a. isn’t applicable in most modern X-ray examinations;

b. means the X-ray dose should be kept as low as possible while maintaining acceptable image quality;

c. means the X-ray examination should be justified;

d. is designed to prevent deterministic effects from occurring;

e. is designed to prevent stochastic effects from occurring.

4. Which statement is incorrect? *

1 point

a. scatter to the operator in general radiology shouldn’t be of concern as they stand behind a shielded barrier;

b. a carer should only remain in the X-ray room if it is otherwise impossible to gain a diagnostically useful image;

c. only use radiation personnel if assistance is required during an X-ray examination;

d. the areas of concern requiring radiation monitoring are organs in the trunk, eyes, hands and skin;

e. the dose limit to the foetus of a pregnant radiation worker is 1 mSv.

5. ICRP’s three principles of radiation protection are: *

1 point

a. protection of individuals and humanity as a whole, while still allowing necessary activities from which radiation exposure might result, limiting dose levels and optimiation;

b. to prevent stochastic, deterministic and hereditary defects from occuring;

c. justification, optimisation and limitation;

d. ALARA, legislation and optimisation;

e. protecting individuals by preventing deterministic effects, limiting the incidence of stochastic effects to acceptable limits and optimising examinations.

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