MDS PREP
Lateral skull view is used for viewing all of the following except
1. Medial wall and root of orbit
2. Nasal bone
3. Nasal septum
4. Calvarium and root of sinus
Radiology
Answer: 3
Lateral skull view is used for viewing all of the following except nasal septum.
Primary source of X-ray photons from an X-ray tube is
1. Stray radiation
2. Bremhaulstrong radiation
3. Characteristic radiation
4. All of the above
Radiology
Answer: 2
The primary source of X-ray photons from an X-ray tube is characteristic radiation.
Filament in X-ray tube is heated by
1. Step-up high voltage transformer
2. Auto transformer
3. Step-down low voltage transformer
4. Ammeter
Radiology
Answer: 3
The filament in the X-ray tube is heated by the step-down low voltage transformer.
Mottling is seen due to
1. Fast film
2. Low speed film
3. Motion
4. Scattered radiation
Radiology
Answer: 4
Mottling is seen due to scattered radiation.
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
In radionuclide imaging, the most useful radiopharmaceutical for skeletal imaging is Technetium-99m linked to Methylene diphosphonate.
For maintaining parallelism between the object and film, film is placed at a distance to avoid distortion, what should be done
1. Increase target to object distance
2. Decrease target to object distance
3. Both of the above
4. None of the above
Radiology
Answer: 1
For maintaining parallelism between the object and film, the film is placed at a distance to avoid distortion by increasing the target to object distance.
In pantamograph, if patient places chin in front of focal trough, the structures appear to be
1. Blurred and magnified
2. Blurred and diminished
3. Either magnified or diminished
4. Only blurred
Radiology
Answer: 2
In a pantomograph, if the patient places their chin in front of the focal trough, the structures appear to be blurred and diminished.
Selection of kilovoltage for dental films depends on
1. Target-firm distance
2. Film-object distance
3. Density of tissues radiographed
4. All of the above
Radiology
Answer: 3
Selection of kilovoltage for dental films depends on the density of tissues radiographed.