MDS PREP
Film exposed to light during development will appear�
�1. Dark
�2. Light
�3. Clear
�4. Blurred
Radiology
Answer: 1
When film is exposed to light during the development process, it results in overexposure, leading to a dark appearance on the developed film. This is due to the silver halide crystals being activated by light, which causes them to darken when developed.
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.
Which of the following statements about developing a dental radiograph is false?
1) It involves chemically precipitating metallic silver
2) It it is too long, it results in an over dark radiograph
3) It typically involves a developer containing sodium thiosulphate
4) None of the above
Radiology
Answer: 2
Explanation: This statement is false because if the developing time is too long, it typically results in an overexposed radiograph, which appears too dark. However, if the developing time is too short, it can lead to an underexposed radiograph, which appears too light.
The gold standard for the diagnosis of osteoporosis is
1. Dual energy X-ray absorptiometry
2. Single energy X-ray absorptiometry
3. Ultrasound
4. Quantitative computed tomography
Radiology
Answer: 1
The gold standard for the diagnosis of osteoporosis is Dual energy X-ray absorptiometry.
Salt and pepper appearance in MRI of salivary gland is suggestive of
1. Sjogren syndrome
2. Thalassaemia
3. Mumps
4. Salivary gland tumour
Radiology
Answer: 1
Salt and pepper appearance in MRI of the salivary gland is suggestive of Sjogren syndrome.
The target of the X-ray tube is angulated to produce all the following effects except
1. To decrease the effective focal spot
2. To increase the image sharpness
3. to energize the photons
4. To dissipate heat
Radiology
Answer: 3
The target of the X-ray tube is angulated to produce all the following effects except to energize the photons.
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.
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.