Errors in x-ray film processing l oral radiology MCQs for dental students

MCQ on errors Errors and quality assurance in x-ray film processing for dental radiology

1. The only variable parameter in dental X-ray machines is

a. Exposure time

b. mA

c. kVp

d. All of the above

2. If the exposure time is less than optimum, the radiograph will appear comparatively

a. Darker

b. Lighter

c. Complete black

d. Will not be affected

3. Underdeveloped radiograph will appear as radiograph with

a. High density

b. Lower density

c. Unaltered

d. Any of the above

4. Burn-out effect may be a result of

a. Underdevelopment

b. Low kVp

c. Higher kVp

d. None

5. Static electricity artefact is more common in

a. Intraoral films

b. Extraoral films

c. Both

d. None

6. In long-term storage, yellowish staining of films is due to

a. Barium sulphide

b. Hydrogen sulphide

c. Sulphur dioxide

d. Retention of water

7. Clear and transparent film are result if the film is dropped in

a. Developer

b. Fixer before developing

c. Water

d. None

8. Overlapping of proximal contact areas is due to improper

a. Vertical angulation

b. Film placement

c. Horizontal angulation

d. None

9. Reverse film placement causes

a. Tyre-track appearance

b. Fogging of film

c. Cervical burn out

d. Blurring

10. Improper alignment of tube causes

a. Phalagioma

b. Cone cut

c. Partial image

d. Both b and c

11. Which is NOT a purpose of the retake log?

a. To identify recurring problems.

b. As a requirement for infection control.

c. To use information to educate staff.

d. To detect problems in order to initiate corrective action.

12. Which circumstance does NOT cause film fog?

a. Stray light.

b. Inappropriate safelight filters.

c. Excessive exposure to a safelight.

d. Working distance of 4 feet from a safelight.

13. The presence of scratches or debris on the intensifying screen results in which artifact?

a. Dark lines.

b. Light areas.

c. Loss of sharpness.

d. Obscured anatomy.

14. If the supporting cassette foam fails to hold the intensifying screen tightly against the film, the resulting image

a. appears light.

b. loses sharpness.

c. has a dark density.

d. shows dark pebbling.

15. Film fog can result from the following except:

A. Over development of the film

B. Over exposure of the film

C. Contaminated solution

D. Defective safe light filter

E. Use of exhausted chemicals

16. Identify the correct statement. Dark spots can be caused if:

A. Drops of developer falls on the film before developing

B. Film touches the developing tank

C. Contact with another film during fixing

D. The film is over developed

17. Identify the wrong statement. Light spots can occur when:

A. Fixer contaminates the film before processing

B. Film touches the tank during developing

C. There is light leakage during development

D. Film touches another film during development

E. Air bubbles are trapped during development

18. Greenish appearance of a film after processing may be due to:

A. Short processing time

B. Weak fixer solution

C. Longer developing time

D. Short processing time and weak fixer solution

19. Films may appear wet after processing due to:

A. Defective fan in the dryer

B. Wrong chemistry

C. Weak fixer

D . Weak developer

20. Direct radiation injury occurs when:

A. X-ray photons hit critical targets within a cell

B. X-rays pass through a volume of tissue

C. X-rays are scattered and form toxins

D. Free radicals combine to form toxins

21. Regarding ghost image, identify the true statement:

A. Is smaller than the actual object

B. Is on the opposite side to the actual image .

C. Is at the same level of the actual image

D. Is a primary image of an actual object.

22. Blurred radiographs can result from:

A. Movement of the patient

B. Movement of the film

C. Double exposure

D. All of the above