Which of the following is true of paralleling cone technique 1) The radiopacity of the zygoma is superimposed on the roots of third molars 2) Easy to place with the film holder 3) Less of gag reflex 4) No need to sterilize the firm holder
RadiologyAnswer: 2
Which of the following resembles caries in radiographs? 1) Zinc oxide eugenol 2) Zinc phosphate 3) GIC 4) Polymethyl methacrylate
RadiologyAnswer: 4
Radiodensity can be increased by 1) Decreasing mA 2) Decreasing kVp 3) Decreasing target-film distance 4) Increasing target-film distance
RadiologyAnswer: 3
In bone scintigraphy all is guessed except 1) Avascular necrosis 2) Fractures 3) Osteomyelitis 4) None
RadiologyAnswer: 4
Lamina dura is 1) Radiographic appearance of alveolar bone proper 2) Radiographic appearance of cortical bone 3) Radiographic appearance of cancellous bone 4) All of the above
RadiologyAnswer: 1
Lateral cephalogram is used for all of the following except 1) To assess where excessive growth is occuring 2) To compare the growth patterns with previous radiograph 3) To assess level of posterior alveolar bone 4) To assess soft tissue profile
RadiologyAnswer: 3
Foreshortening of radiographic image results when central X-ray is 1) Parallel to object and film 2) Parallel to object but not to film 3) Perpendicular to film but not to object 4) Perpendicular to object but not to film
RadiologyAnswer: 3
The purpose of aluminium filters in the path of X-ray beam is to 1) Increase contrast 2) Reduce patient exposure 3) Reduce film density 4) Reduce film details
