MDS PREP
The main purpose of intensifying screens in extraoral radiographic films is
1) To increase the contrast of film
2) To increase the exposure time
3) To decrease the speed of film
4) Decrease secondary radiation to patient
Radiology
Answer: 4
If the size of object is 20 cm, object-film distance is 5 cm and source-film distance is 25 cm, what is the size of object on film
1) 20 cm only
2) 21 cm only
3) 25 cm only
4) 22 cm only
Radiology
Answer: 3
In radionuclide imaging the most useful radiopharmaceutical for skeletal imaging is
1) Gallium 67
2) Technetium-sulphur-colloid
3) Technetium-99m
4) Technetium-99m linked to Methylene disphosphonate
Radiology
Answer: 4
Among the natural radiation, the one that contributes to more radiation exposure of general population
1. Cosmic
2. Terrestrial
3. Radon
4. Consumer products
Radiology
Answer: 3
Inventor of orthopantomographic machine is
1) Hounsfield
2) Roentgen
3) Kell
4) Namata
Radiology
Answer: 4
Initiator in developing solution is
1) Acetic acid
2) Sodium thiosulphate
3) Hydroquinone
4) Potassium bromide
Radiology
Answer: 3
Which of the following resembles caries in radiographs?
1. Zinc oxide eugenol
2. Zinc phosphate
3. GIC
4. Polymethyl methacrylate
Radiology
Answer: 4
Radiographically, the normal horizontal plane of alveolar bone interdentally is related to
1. Cementoenamel junction of adjacent teeth
2. Epithelial attachement of adjacent teeth
3. Trabecular pattern of bone
4. All of the above