1. radioisotopes are used in the following technique except

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2. Black branching lines appear on a processed film. Which of the following is the most likely cause?

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3. In the body which atom is useful in magnetic resonance imaging(MRI)

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4. Which of the following focuses the electrons into a narrow beam and directs the beam across the tube towards tungsten target of the anode

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5. All of the following cells in the body are relatively resistant to damage by radiation except

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6. A 21-year-old woman went to her dentist because of facial asymmetry. This asymmetry had developed gradually over 3 years. The patient had no symptoms. A diffusely opaque lesion was found in her right maxilla. All laboratory tests (complete blood count, alkaline phosphatase, calcium) were within normal limits. A biopsy specimen was interpreted as a fibro-osseous lesion. This patient most likely has ______.

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7. Linear no- threshold dose relationship gives a direct relation between:

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8. Maxillary sinus is seen in

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9. The first electron donor in a developer solution is

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10. If your film-based radiographs start coming out too light, it may be that the ______.

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11. A 40 year old male got a blow to angle of mandible but remained asymptomatic.Radiographic examination shows a radioopaque line in the concerned area with a sharp undercut at the lower border of mandible.It may be

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12. Sharpness of image is increased by

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13. a patient with a history of radiation therapy requires special consideration because

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14. Photoelectric interactions are highest in _____.

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15. Normal angulation for recording a periapical radiograph of a maxillary lateral incisor:

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16. the quantity of electrons available for x rays is determined primarily by

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17. consistent radiographs require

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18. the heel effect results

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19. What is the name of the radiographic technique when the central ray of the cone is directly perpendicular to the object?

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20. on the radiograph the mesial site of mandibular 1st molar revealed bone loss of 2-3 mm.on probing 6mm pocket was revealed.the discrepancy could be due to

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