Radiology 3
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Radiology 3
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25 Questions

1. Aluminum disks between collimator and tubehead seal. Aluminum disks filter long wavelength - low energy x-rays from x-ray beam. 0.5 mm increments

2. Occurs very little; most photons pass through cell with little or no damage

3. Restricts size and shape of beam to lower patient exposure - Round: cone shaped beam-2.75 inches in diameter - Rectangular: Rectangular beam slightly larger than size 2 film- lowers patient exposure

4. Linear prominence that appears radiopaque.

5. Between canine and lateral incisor - depression is not always visible - radiolucent

6. Dental x-ray machines operating 70 kVp or below: minimum 1.5 mm aluminum filtration - Dental x-ray machines operating above 70 kVp: minimum of 2.5 mm. of aluminum filtration.

7. Located at the midline of anterior portion of hard palate behind maxillary central incisors; round radiolucency between roots of centrals

8. Scooped out of depressed area of bone that appears radiolucent

9. Continues from ramus; radiopaque band

10. Used to increase incoming voltage to 65 -000 to 100 -000 volts used by the high-voltage circuit.

11. Tubes within maxillary sinus that carry nerves - blood supply - radiolucent band with boundary of two radiopaque cortical bony lines

12. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.

13. Somatic effects that have a threshold; effects increase in severity with increasing absorbed dose. (Examples: Erythema - loss of hair - cataracts - and decreased fertility)

14. Pear shaped compartment - appears above maxillary incisors. Appears as a large radiolucent area above the maxilla.

15. Area of body exposed total body produced more adverse effects

16. Occurs frequently due to the high concentration of water in cells.

17. U-shaped portion extending from ramus to ramus

18. Intersection of maxillary sinus and nasal cavity - radiopaque - cortical bone; above maxillary canine.

19. Reproductive (ova - sperm). Effects are passed on to generations. Genetic damage cannot be repaired

20. Cortical bone - radiopaque band above maxillary incisors

21. Tube that travels length of mandible - radiolucent; has cortical walls - houses inferior alveolar nerve

22. Coronal part of alveolar bone - between teeth - cortical bone - radiopaque

23. Thin - curved areas of bone - radiopacities within nasal cavity and septum

24. Depression of bone; submandibular salivary gland found here; radiolucent; below mylohyoid ridge

25. Produced when a high-speed electron dislodges an inner-shell electron from a tungsten atom and causes ionization of that atom. Occurs only at 70 kVp and above.

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