CBCT Licensing SA – With Exam

1) Identify the structure indicated by the arrow marked “A” in this x-ray tube and which material is it made it from? (1 mark)

2) In an x-ray tube, the focusing cup is made of …………….?  (1 mark)

3) During x-ray production, how much energy is converted into x-rays? (1 mark)

4) Which of the following is NOT a characteristic feature of TUNGSTEN TARGET used in X-Ray tube head? (1 mark)

5) Which radiation is produced when high-speed electrons pass close to, or strike, the nuclei of the target atoms (1 mark)

6) When an x-ray is produced by an interaction that results in characteristic radiation, an electron:  (1 mark)

7) If you increase the peak kilovoltage (kVp) in an X-ray tube, you are:   (1 mark)

i) Increasing the number of x-rays produced
ii) Increasing the kinetic energy of the x-rays produced
iii)  Changing the direction of the x-rays
iv) Increasing the penetrating ability of the X-rays

8) Which of the following is classified as a somatic stochastic effect of radiation? (1 mark)

9) Which among the following about somatic deterministic effects of radiation is false?  (1 mark)

10) Which of the following is a measure of the cancer risk to a whole organism due to ionizing radiation delivered non-uniformly to part(s) of its body?  (1 mark)

11) Identify the type of Radiation effect based on the following characteristic features  (1 mark)

• It is the effect induced when body is exposed to any dose of radiation
• There is no threshold dose
• Severity of effect is not proportional to the dose of radiation

12) What is the SI Unit of Effective dose?  (1 mark)

13) According to Australian Radiation Protection and Nuclear safety agency (ARPANSA)’s recommendations, how much is the maximum dose limit for pregnant dental practitioner?  (1 mark)

14) In dosimetry, the Equivalent Dose takes into account: (1 mark)

15) As detailed in the ARPANSA guidelines, how much is the  permissible level (for general public) of radiation per annum?

16) As detailed in the ARPANSA guidelines, how much is the  permissible level (for occupationals) of radiation per annum? (1 mark)

17) How much is the minimum equivalent thickness of lead required for a protective lead apron? (1 mark)

18) Which among the following tissue is least sensitive to radiation? (1 mark)

19) Which among the following components in the X-ray tube helps to absorb the heat? (1 mark)

20) Which among the following doesn’t act as a filter in the X-ray tube? (1 mark)

21) A collimator in the X-ray tube is made up of? (1 mark)

22) Statement 1 – Radiographs to be advised only after taking detailed history, a thorough clinical examination and considering dental and general health needs of the patient

Statement 2 – You should place thyroid collar for patients who are undergoing OPG examinations  (1 mark)

23) The inverse square law states that  (1 mark)

24) Statement 1 – For OPG/Lat Ceph and CBCT, you should leave the room during exposure

Statement 2 – For intraoral Radiography – You should stand 6 feet (2 m) away from the primary beam at an angle of 90 to 135 degree. (1 mark)

25) Which among the following statement is false? (1 mark)

26) Statement 1 – Dentists who record panoramic radiographs need to take responsibility for all non-dental diagnosis or have them assessed by or referred to a DMF radiologist or radiologist

Statement 2 – Dentists who record large volume CBCT need to refer all data sets to Dentomaxillofacial radiologists/General radiologists for review, as they have the highest medicolegal risk.  (1 mark)

27) Which among the following is not a required characteristic for an ideal CBCT image for diagnosis? (1 mark)

28) Which among the following is false regarding a CBCT? (1 mark)

29) Which among the following statement regarding resolution of a CBCT image is false?

30) Identify the type of CBCT image. (1 mark)

31) What does the red line represent? (1 mark)

32) Which among the following is false regarding a pixel and voxel in CBCT?  (1 mark)

33) Identify the type of CBCT image. (1 mark)

34) Statement 1 – Every patient require a CBCT for diagnosis.

Statement 2 – It is not necessary to read the whole CBCT dataset but just the area of interest is sufficient.  (1 mark)

35) Identify the cone beam artifact indicated by 1 in this image? (1 mark)

36) Identify the cone beam artifact indicated by 2 in this image? (1 mark)

37) Identify the cone beam artifact indicated by 3 in this image? (1 mark)

38) Identify the error in this CBCT image? (1 mark)

39) Identify the artifact in this CBCT image? (1 mark)

40) Identify the artifacts indicated by the white arrows? (1 mark)

41) Identify the artifact indicated by the arrow (1 mark)

42) Identify the artifact indicated by the arrow (1 mark)

43) Statement 1 – Partial volume averaging happens when the selected voxel size of the scan is smaller than the object being imaged

Statement 2 – Partial volume averaging can be avoided by selecting small voxel (1 mark)

44) Statement 1 – CBCT equipment compliance testing should be done every year

Statement 2 – CBCT premises compliance testing should be done every 5 years  (1 mark)

45) Which among the below statement is FALSE regarding optimization of patient dose while taking a CBCT? (1 mark)

46) Do you give us permission to use your feedback for promotional purposes on social media?