MDS PREP
Reflecting layer used in intensifying screens
1. Calcium tungstate
2. Titanium oxide & magnesium carbonate
3. Gaddinium oxysulphide
4. Lanthanum oxybromide
Radiology
Answer: 2
The reflecting layer used in intensifying screens is titanium oxide & magnesium carbonate.
Radiographic image of a malignant tumour is
1. Distinct sclerotic borders
2. Geographic bone destruction
3. Sunburst appearance
4. All of the above
Radiology
Answer: 3
Radiographic image of a malignant tumour is characterized by sunburst appearance.
The technique employed in radiotherapy to counteract the effect of tumour motion due to breathing is known as
1. Art technique
2. Modulation
3. Gating
4. Shunting
Radiology
Answer: 3
The technique employed in radiotherapy to counteract the effect of tumour motion due to breathing is known as gating.
Density of film is inversly proportional to all of the following except
1. Collimation
2. Filteration
3. Target-film distance
4. Kilo volt
Radiology
Answer: 4
The density of a radiographic film is inversely proportional to factors like collimation, filtration, and target-film distance, but not to kilovoltage (kV), which affects the quality of the image.
Which of the following is a possible cause for a low density radiograph
(light film?)
1. Cold developer
2. over exposure
3. Improper safety light
4. Excessive developing time
Radiology Answer: 1
Overexposure typically results in a darker film, not a lighter one. An improper safety light or excessive developing time would not directly cause a low density radiograph. It is essential to maintain the correct temperature and time in the developing process to achieve a diagnostic image quality. A cold developer will not fully develop the film, leading to a lighter, less detailed image.
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.
Which of the following has a radiolucency closest to the dentin
1. ZOE
2. Calcium hydroxide
3. Silicophosphate
4. Gutta percha
Radiology
Answer: 3
Which of the following has a radiolucency closest to the dentin: silicophosphate.
Injecting radiopaque dye into the joint space to visualize the joint is referred to as
1. Arthroscopy
2. Arthrography
3. Orthropantomography
4. Arthroplasty
Radiology
Answer: 2
Injecting radiopaque dye into the joint space to visualize the joint is referred to as arthrography.