MDS PREP
Crimp marks in a radiograph are due to
1) Droplets of fixing solution
2) Droplets of developing solution
3) Static electricity
4) Sharp bending of the film
Radiology
Answer: 4
Crimp marks in a radiograph are due to sharp bending of the film.
Crimp marks are artifacts that appear as linear or curvilinear indentations on a
radiograph. They are typically caused by the film being sharply bent or folded
during the developing process. These marks can obscure important anatomical
structures and may lead to incorrect diagnoses if not recognized as artifacts.
They are not related to the droplets of fixing or developing solution (which
would not create such sharp lines) or static electricity.
Base of skull can be viewed by
1. Towne"s projection
2. Submentovertex
3. PA view of skull
4. Both A and B
Radiology
Answer: 4
The base of the skull can be viewed by both Towne's projection and Submentovertex.
Double intensifying screen and screen film are used in extraoral radiographs to
1. Reduce density
2. Reduce contrast
3. Reduce exposure time
4. Reduce secondary radiation
Radiology
Answer: 3
Double intensifying screen and screen film are used in extraoral radiographs to reduce exposure time.
In which TMJ view central X-ray passes through sigmoid notch
1. Infracranial
2. Frontal view
3. Transcranial
4. Transorbital
Radiology
Answer: 1
In the TMJ view, the central X-ray passes through the sigmoid notch in the infracranial view.
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.
The radiograph showing one of the best view of a fracture of
1. The orbital rim is the 30 degree occipitomental view
2. The orbital floor is the 10 degree occipitomental view
3. The orbital medial wall is the lateral skull view
4. The orbital roof is the lateral skull view
The radiograph showing the best view of a fracture of the orbital floor is the 10-degree occipitomental view.
An intraoral periapical X-ray is taken for evaluation of impacted third molar. Another X-ray is taken with downward angulation to first one. If third molar is lingual impaction it will appear to
1. Move downward in relation to inferior alveolar canal
2. Move upward in relation to inferior alveolar canal
3. Be stable in relation to inferior alveolar canal
4. None of the above
Radiology
Answer: 1
If a third molar is lingually impacted, it will appear to move downward in relation to the inferior alveolar canal when taking a second X-ray with downward angulation.
Which of the following is/are Secreted by macrophages?
1, Coagulation proteins V. VII. IX, X/ plasmin
2. Cytokines IL-I C. Growth factor
4. All of the above