MDS PREP
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.
Objects which cause attenuation of X-ray beam are shown as............in image
1. Radiolucent
2. Radiopaque
3. Gray
4. None of the above
Radiology
Answer: 2
Objects which cause attenuation of X-ray beam are shown as radiopaque in an
image.
Radiopaque materials absorb or block X-rays, leading to a reduced transmission
of the X-ray beam. This results in the appearance of white areas or shadows on
the X-ray image, indicating the presence of dense structures like bone, metal
restorations, or calculi. Radiolucent structures, on the other hand, allow
X-rays to pass through more freely, resulting in dark areas on the image.
The sialographic appearance of a normal salivary gland is
1. Branching with bloom
2. Branching with leaves
3. Branchless with fruit-laden
4. Branchless with leaves
Radiology
Answer: 1
The sialographic appearance of a normal salivary gland is branching with bloom.
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
The cathode in a Coolidge tube is made of molybdenum, whereas the anode is made of copper.
Fractures of remus and body of mandible can be best seen in
1. Lateral oblique 30 degrees
2. Lateral oblique 15 degrees
3. PA view of mandible
4. Occipitomental view
Radiology
Answer: 2
Fractures of the ramus and body of the mandible can be best seen in lateral oblique 15 degrees.
The anatomical structure of mandible commonly seen in periapical films of maxillary third molar region is
1) Coronoid process
2) Condylar process
3) Ramus mandible
4) Body of mandible
Radiology
Answer: 1
The coronoid process of the mandible may project into the maxillary third molar region on periapical radiographs when the patient opens their mouth wide. Other structures, like the condylar process or ramus, are less likely to overlap in this region.
Characteristic of screen film used for cephalometric radiograph
1. High contrast, medium-speed
2. Low contrast, faster speed
3. Low contrast, wide latitude
4. High contrast, high speed
Radiology
Answer: 3
Characteristic of screen film used for cephalometric radiograph is low contrast, wide latitude.
The region which is closest to satisfying all the principles of shadow casting and parallel placement of the film in a paralleling technique full mouth series of periodical radiographs is
1. Maxillary premolar view
2. Mandibular premolar view
3. Maxillary molar view
4. Mandubular molar view
Radiology
Answer: 4
The region closest to satisfying all the principles of shadow casting and parallel placement of the film in a paralleling technique full mouth series of periapical radiographs is mandibular molar view.