OPG/Lat Ceph Licensing Exam (VIC)

1) Which among the following is not a characteristic feature of X-Ray? (1 mark)

2) Most x-ray interactions with matter occur by: (1 mark)

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

4) In a dental x-ray tubehead, the internal collimator is made of: (1 mark)

5) The peak kilovoltage (kVp) determines (either wholly or in part):

i) The number of x-rays produced

ii) The energy of the x-rays produced

iii) The direction x-rays travel

iv) The patient’s radiation exposure
(1 mark)

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

7) In dosimetry, the Equivalent Dose takes into account the amount of radiation: (1 mark)

8) 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)

9) Which of the following statements about Double real image  in a Panoramic Radiograph is false? (1 mark)

10) Which of the following statements about Ghost image in a Panoramic Radiograph is false? It appears (1 mark)

11) Which among the following statement(in a Panoramic Radiograph) is false? If the Frankfort Plane is angled upward,
(1 mark)

12) Which among the following statement(in a lateral ceph) is false? (1 mark)

13) The correct head position for a lateral cephalogram requires the: (1 mark)

14) Identify the structure indicated by the arrow marked “A” in this x-ray tube, and name the material it is made from?
(2 marks)

15) Fill up the blank

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

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

17) 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

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

19) If a female dental practitioner is pregnant, the maximum permissible effective dose the unborn baby may be exposed to if absolutely required for diagnostic purposes is…………… (1 mark)

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

21) Write the 3 Guiding principles in radiation protection in detail. (3 marks)

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

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

24) What is inverse square law? (1 mark)

25) Identify the head positioning error on this film?  (1 mark)

26) Which direction was the patient’s head turned (left or right)? (1 mark)

27) Identify the positioning error in this film? (1 mark)

28) Looking at this radiograph; has the patient correctly positioned their tongue on the palate? (1 mark)

29) What do you think the faint radiopaque shadow indicated by the arrows is? (1 mark)

30) The crowns of anterior teeth appear dark. What is the cause? (1 mark)

31) Identify the encircled radiopacity (1 mark)

32) Identify the cause for this error in the radiograph. (1 mark)

33) What are the causes of noisy images (2 marks)

34) Name the most obvious error with this radiograph (1 mark)

35) Identify two most obvious errors in this radiograph? (2 marks)

36) What do you think the linear radiopaque line indicated by red arrows is? Please be specific. (1 mark)

37) What do you think is the large radiolucency indicated by white arrows? (1 mark)

38) What caused the vertical hazy white (radiopaque) area (3-4cm width) in the center of film? (1 mark)

39) Name the most obvious fault with this radiograph (1 mark)

40) Which anatomical structure is represented by the curved radiopacity indicated by the red arrows? (1 mark)

41) Please give your valuable feedback. (min 35 – 40 words)