MDS PREP
The following projection best locates the position of impacted third molar
1. Lateral oblique view of mandible
2. Waters view
3. Occlusion view combined with periapical view
4. Occlusal view combined with bite wing
Radiology
Answer: 3
The projection that best locates the position of an impacted third molar is occlusion view combined with periapical view.
The best image obtained if duplicating film is exposed tp
1. X-rays
2. UV rays
3. Visible light
4. Infrared light
Radiology
Answer: 2
The best image obtained if duplicating film is exposed to UV rays.
In reverse Townes projection central X-ray passess through
1. Maxillary sinus
2. Occipital bone
3. Buperior border of petrous
4. Inferior border of petrous
Radiology
Answer: 2
In reverse Townes projection, the central X-ray passes through the occipital bone.
Too light, thin, faded image on radiographic film is the result of
1. Overexposure of film
2. Concentrated developer solution
3. Exhausted developer solution
4. Pre-exposure of radiographic
Radiology
Answer: 3
Too light, thin, faded image on radiographic film is the result of exhausted developer solution.
Zonography is a type of
1. CT scan
2. Radionuclide imaging
3. Panoramography
4. MRT
Radiology
Answer: 3
Zonography is a type of panoramography.
The cathode in Coolidge tube is made of..............whereas anode is made of...............
1) Copper; copper
2) Molybdenum; copper
3) Iron; lead
4) Aluminium; iron
Radiology
Answer: 2
Explanation: In a Coolidge tube, the cathode is typically made of molybdenum, which has a high melting point and is effective for electron emission. The anode is usually made of copper, which has excellent thermal conductivity, allowing it to dissipate heat generated during x-ray production effectively.
In steps in developing film first step is
1) Stirring the solution
2) Washing of film
3) Dip in developer
4) Dip in fixer
Radiology
Answer: 1
The first step in developing radiographic film is to ensure that the developing solution is well-mixed and at the correct temperature, which is achieved by stirring the solution (option 1). This ensures uniformity in the chemical reaction that will occur during the development process.
Washing the film (option 2) occurs after development to remove excess chemicals, while dipping in developer (option 3) is the actual step that follows stirring. Dipping in fixer (option 4) is the final step to stabilize the image.
Occluded submandibular salivary duct can be best observed by
1. Palpation
2. Sialography
3. Occlusal X-ray
4. Thermography
An occluded submandibular salivary duct can be best observed by sialography.