1. which of the following is the least radiosensitive tissuesWBC,bone cells,epithelial cellsRBC,muscle cell,nerve cellmuscle cells,nerve cells,bone cellsconnective tissue cell,endothelial cell,muscle cellQuestion 1 of 20 2. In cone beam CT scan what is the artifact seen when the size of the object being imaged is smaller than the voxel sizePartial volume averagingBeam hardeningDistortionStreakingQuestion 2 of 20 3. Which of the following doesnot apply to filtration of an x-ray beam in a modern x-ray unit?Reduces patient exposure by removing lower energy photonsProvided by an aluminum filterDecreases the mean energy of the x-ray beamRequired to be 1.5 mm thick for 70 kVpQuestion 3 of 20 4. the component of developer that gives detail to the radiographic image ispotassium bromidesodium carbonatesodium sulphatehydroquinoneQuestion 4 of 20 5. The radiation generated at the anode of the x-ray tube is calledScattered radiationPrimary radiationReverse radiationPotential radiationQuestion 5 of 20 6. Increased caries incidence secondary to radiation therapy occurs because of the effect of radiation onMandibleTongueParotid glandMaxillary sinusQuestion 6 of 20 7. Mc gregor and trapnell lines are seen on atrue lateral viewSMVPA view skullwater's viewQuestion 7 of 20 8. On a routine radiographic examination, a well-defined radiolucent lesion was seen in the body of the mandible of a 17-year-old boy. At the time of operation, it proved to be an empty cavity. What is this lesion?Osteoporotic bone marrowTraumatic bone cystAneurysmal bone cystOdontogenic keratocystQuestion 8 of 20 9. Oxygen deficient cells areRadiosensitive tissueNo effect of oxygen levelAnticollagenase activityRadioresistantQuestion 9 of 20 10. the gold standard for the diagnosis of osteoporosis issingle energy x ray absorptiometryultrasoundquantitative computed tomographydual energy x ray absorptiometryQuestion 10 of 20 11. the x ray beam is filtered tosoften the x rayremove long wavelength x raysremove short wavelength x raysrestrict the beam sizeQuestion 11 of 20 12. consistent radiographs requireautomatic processinglong cone technique fixed KVp and mAproper developingQuestion 12 of 20 13. radiographic diagnosis of dense radioopaque cotton wool areas throughout the entire body of the mandible and associated with hypercementosis is most likelypaget's diseaseexostosisenostosisosteomyelitisQuestion 13 of 20 14. occlusal radiograph are useful in locatingsialoliths in whartons ductmaxillary sinus mucocelessialoliths in stensons ductthe mental foramenQuestion 14 of 20 15. The angle at which the operator should stand from x ray tube for safety150-185 degree90-135 degree135-180 degree45-90 degreeQuestion 15 of 20 16. If your film-based radiographs start coming out too light, it may be that the ______.Developer needs changingDeveloper is too hotFixer needs changingExposure time is too longQuestion 16 of 20 17. dead bone appear on a radiograph asradiolucentcotton wool appearanceradio opaquesalt and pepper appearanceQuestion 17 of 20 18. Structures seen in maxillary anterior periapical radiographMaxillary sinusGenial tuberclesZygomatic arch/zygomatic process of maxillalateral fossaQuestion 18 of 20 19. paralleling technique is used tominimize superimposition of anatomic structureprevent elongation of imageprevent shortening of imageminimize distortionQuestion 19 of 20 20. In dental Xray tube, the number of electrons flowing per second is measured bymilliamperetimeKVpnone of the aboveQuestion 20 of 20 Loading...
