1. Which of the following projections is the best for evaluating the maxillary sinus?Submentovertex projectionReverse Towne projectionWaters projectionLateral jaw projectionQuestion 1 of 20 2. which type of radiation effect results in radiation induced thyroid cancersomaticteratogenicautosomalgeneticQuestion 2 of 20 3. Film size used to evaluate TMJ8*10 inch10*12 inch5*7 inch4*3 inchQuestion 3 of 20 4. which is the best method to reduce radiation exposure to patient during a full mouth seriesUse of F speed filmsuse of digital imagingSubstitute a panaromic image for the full mouth seriesUse of E speed filmsQuestion 4 of 20 5. Oxygen deficient cells areRadiosensitive tissueAnticollagenase activityRadioresistantNo effect of oxygen levelQuestion 5 of 20 6. occlusal radiograph are useful in locatingthe mental foramenmaxillary sinus mucocelessialoliths in stensons ductsialoliths in whartons ductQuestion 6 of 20 7. all of the following increases radiation exposure exceptuse of gridslow KVPhigh KVPuse of low speed filmsQuestion 7 of 20 8. The purpose and use of the panaromic image include all of the following except one. Which one is the exceptionTo evaluate impacted teethTo examine extent of large lesionsTo evaluate and diagnose cariesTo evaluate traumaQuestion 8 of 20 9. in radionucleotide imaging the most useful radio pharmaceutical for skeletal imaging istechnetium -99m linked to methylene disphosphonatetechnetium-sulphur colloidtechnetium-99mgallium 67Question 9 of 20 10. Advantage of CT SCAN over CBCT isFan shaped beanGreater contrast resolutionAll of the aboveReduced radiation doseQuestion 10 of 20 11. which layer of epithelium of oral mucous membrane is more sensitive to radiationstratum granulosumstratum basalestratum corneumstratum spinosumQuestion 11 of 20 12. Which of the following statements about obtaining the most geometrically accurate image is false?The central ray should be perpendicular to the film.The object-to-film distance should be short.The central ray should be parallel to the object.The film should be parallel to the object.Question 12 of 20 13. Which projection is best for examining zygomatic arch fractures?Lateral cephalometric projectionWaters projectionReverse Towne projectionSubmentovertex projectionQuestion 13 of 20 14. During radiographic imaging, predominant X-rays are produced by:Photoelectric effectCompton scatteringCoherent scatteringBremstrahlung radiationQuestion 14 of 20 15. In dental Xray tube, the number of electrons flowing per second is measured byKVpmilliamperetimenone of the aboveQuestion 15 of 20 16. a dentist is using a film badge service to measure his radiation exposure.the report from the film badge service indicates that the badge was exposed to 475 millirems in the previous month the dentist shouldreevaluate his radiation hygiene proceduresuse lower speed film to reduce MaSstop taking radiographs immediatelyincrease target film distanceQuestion 16 of 20 17. Fogging seen in x- ray film is seen due to all of the following reasons exceptGridOld filmImproper safe lightingStray radiationsQuestion 17 of 20 18. Which of these structures hinders in imaging the root of maxillary molarsZygoma and zygomatic process of maxillaMaxillary sinuspalatine boneOrbital process of zygomaQuestion 18 of 20 19. the technique employed in radiotherapy to counteract the effect of tumor motion due to breathing is known asmodulationarc technique shuntinggatingQuestion 19 of 20 20. The period between radiation exposure and the onset of symptoms is called thePeriod of cell injuryLatent periodRecovery periodnone of the aboveQuestion 20 of 20 Loading...
