MDS PREP
Submentovertex view is best useful for
1. Sinuses
2. Zygomatic fractures
3. Mandibular fractures
4. Maxillary fractures
Radiology
Answer: 3
Submentovertex view is best useful for mandibular fractures.
All of the following form radiolucent stones except
1. Xanthine
2. Cysteine
3. Allopurinol
4. Orotic acid
Radiology
Answer: 4
All of the following form radiolucent stones except orotic acid.
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.
Nasal septum can be best viewed by
1. Occipitomental view
2. Submentovertex
3. Lateral skull
4. Towne"s view
Radiology
Answer: 1
The nasal septum can be best viewed by occipitomental view.
Overexposure of film results in
1. Increased density and dark film
2. Increased density and light film
3. Decreased density and light film
4. Decreased density and dark film
Radiology
Answer: 1
Overexposure of film results in increased density and dark film.
Minimum percentage of cortical bone loss that should occur to be demonstrable in radiographic
1) 6.6 %
2) 13 %
3) 20 %
4) 30-40 %
Radiology
Answer: 2
Radiographic evidence of cortical bone loss typically becomes apparent when at least 13% of the bone height has been lost. This is because the density of the bone and the surrounding structures needs to be significantly altered to be detectable on an X-ray film.
Zygoma fractures can be best viewed by
1. Occipitomental view
2. Lateral oblique
3. Towne"s view
4. True lateral
Radiology
Answer: 1
Zygoma fractures can be best viewed by occipitomental view.
Loss of lamina dura and ground glass appearance indicates
1. Paget"s disease
2. Fibrous dysplasia
3. Caffey"s disease
4. Osteomalacia
Loss of lamina dura and ground glass appearance indicates fibrous dysplasia.