Radiation Safety Multiple Choice Questions
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Question 1 of 40
1. Question
Concerning staff radiation protection in the fluoroscopy room
(a) The overhead lead perspex shield should be positioned closest to the radiologist
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Question 2 of 40
2. Question
Concerning staff radiation protection in the fluoroscopy room
(b) Using an overcouch tube position minimises scattered radiation dose to staff in the room
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Question 3 of 40
3. Question
Concerning staff radiation protection in the fluoroscopy room
(c) The limit on the equivalent dose to the lens of the eye is 50mSv in a calendar year
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Question 4 of 40
4. Question
Concerning staff radiation protection in the fluoroscopy room
(d) Only essential staff should be working in the controlled area
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Question 5 of 40
5. Question
Concerning staff radiation protection in the fluoroscopy room
(e) Lead aprons must be worn at all times by all staff working in the controlled area
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Question 6 of 40
6. Question
Concerning radiation protection of the patient
(a) All radiation exposures must be justified by the IRMER practitioner prior to exposure
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Question 7 of 40
7. Question
Concerning radiation protection of the patient
(b) The use of lead protection for the patient is generally advised as good practice
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Question 8 of 40
8. Question
Concerning radiation protection of the patient
(c) All imaging protocols must be optimised to ensure the best image quality is obtained
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Question 9 of 40
9. Question
Concerning radiation protection of the patient
(d) For fluoroscopic procedures, the patient should be positioned as close as possible to the imaging detector and as far as possible from the X-ray tube to keep the dose to the skin ALARP
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Question 10 of 40
10. Question
Concerning radiation protection of the patient
(e) Removing the anti-scatter grid for smaller paediatric patients will reduce the level of exposure required
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Question 11 of 40
11. Question
The most effective methods of radiation protection in nuclear medicine involve
(a) Performing tasks as quickly as possible to minimise exposure time instead of using shielding that could slow the user down
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Question 12 of 40
12. Question
The most effective methods of radiation protection in nuclear medicine involve
(b) Using lead shielding to protect against beta emissions
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Question 13 of 40
13. Question
The most effective methods of radiation protection in nuclear medicine involve
(c) Performing all possible interactions with a patient before they are injected with the radiopharmaceutical
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Question 14 of 40
14. Question
The most effective methods of radiation protection in nuclear medicine involve
(d) Only entering controlled areas when necessary
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Question 15 of 40
15. Question
The most effective methods of radiation protection in nuclear medicine involve
(e) Using a dose rate meter to monitor for contamination when leaving a controlled area
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Question 16 of 40
16. Question
Concerning the breast-feeding patient
(a) Consider delaying breast feeding for 2 weeks after injection for all diagnostic studies
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Question 17 of 40
17. Question
Concerning the breast-feeding patient
(b) Cease breast feeding for studies using I131 iodide
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Question 18 of 40
18. Question
Concerning the breast-feeding patient
(c) Seek advice from a medical physics expert (MPE)
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Question 19 of 40
19. Question
Concerning the breast-feeding patient
(d) Consider using an alternative radiopharmaceutical
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Question 20 of 40
20. Question
Concerning the breast-feeding patient
(e) All radiopharmaceuticals have an affinity to breast milk
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Question 21 of 40
21. Question
Concerning radiation dose to the patient in gamma imaging
(a) The organ of interest that takes up the radiopharmaceutical is referred to as the target organ
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Question 22 of 40
22. Question
Concerning radiation dose to the patient in gamma imaging
(b) Almost all the gamma ray energy is deposited inside the organ being imaged and little energy irradiates other tissues
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Question 23 of 40
23. Question
Concerning radiation dose to the patient in gamma imaging
(c) The effective half-life of a radiopharmaceutical affects the patient’s effective whole body dose
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Question 24 of 40
24. Question
Concerning radiation dose to the patient in gamma imaging
(d) The dose delivered by a planar radionuclide examination is affected by the number of images taken
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Question 25 of 40
25. Question
Concerning radiation dose to the patient in gamma imaging
(e) Nuclear medicine diagnostic reference levels (DRLs) are patient doses in mSv that must not be exceeded
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Question 26 of 40
26. Question
Techniques that promote patient dose savings in CT are
(a) Increasing the pitch, where clinically appropriate
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Question 27 of 40
27. Question
Techniques that promote patient dose savings in CT are
(b) Audit DLP against NDRLs and identify opportunities for dose reduction
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Question 28 of 40
28. Question
Techniques that promote patient dose savings in CT are
(c) Always use lower kV available on scanner for contrast scans
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Question 29 of 40
29. Question
Techniques that promote patient dose savings in CT are
(d) Use automatic tube current modulation
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Question 30 of 40
30. Question
Techniques that promote patient dose savings in CT are
(e) Use prospective ECG-gated acquisition
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Question 31 of 40
31. Question
Concerning radiation safety to staff in CT
(a) The primary source of scatter to staff in the room are the walls, ceiling and floor.
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Question 32 of 40
32. Question
Concerning radiation safety to staff in CT
(b) Areas shielded from patient scatter are to the sides of the gantry (at 90 degrees to the patient table)
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Question 33 of 40
33. Question
Concerning radiation safety to staff in CT
(c) A lead apron of 0.25 mm lead equivalent is suitable when undertaking CT biopsies in the controlled area.
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Question 34 of 40
34. Question
Concerning radiation safety to staff in CT
(d) Staff doses in CT are typically higher than those for staff working in radiology.
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Question 35 of 40
35. Question
Concerning radiation safety to staff in CT
(e) The shielding requirements of a CT room will be the same irrespective of the workload
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Question 36 of 40
36. Question
Which of the effective doses estimates for CT procedures (adult) are correct*
(a) CT Brain (2 mSv), Cardiac Coronary CT Angiography (8 mSv), CT Chest (6 mSv)
*dose values vary significantly depending on protocol and technology used. The values presented are indicative values.
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Question 37 of 40
37. Question
Which of the effective doses estimates for CT procedures (adult) are correct*
(b) Dose to the foetus due to CTPA on a pregnant patient (25 mSv)
*dose values vary significantly depending on protocol and technology used. The values presented are indicative values.
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Question 38 of 40
38. Question
Which of the effective doses estimates for CT procedures (adult) are correct*
(c) CT Abdomen Pelvis (8 mSv), CT Chest-Abdomen-Pelvis (16 mSv)
*dose values vary significantly depending on protocol and technology used. The values presented are indicative values.
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Question 39 of 40
39. Question
Which of the effective doses estimates for CT procedures (adult) are correct*
(d) Effective dose for CT Chest is approximately 30x higher than for Chest X-Ray
*dose values vary significantly depending on protocol and technology used. The values presented are indicative values.
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Question 40 of 40
40. Question
Which of the effective doses estimates for CT procedures (adult) are correct*
(e) Barium Enema (6 mSv), CT Brain (9 mSv)
*dose values vary significantly depending on protocol and technology used. The values presented are indicative values.
CorrectIncorrect