MDS PREP
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.
Light radiographic film is due to
1. Overdeveloping
2. Overfixing
3. Directly putting in fixer
4. Exposure to sunlight
Radiology Answer: 2
Overfixing occurs when the radiographic film remains in the fixing solution for an extended period, leading to excessive clearing of the image. Fixing agents, such as sodium thiosulfate, dissolve unexposed silver halide crystals. Prolonged exposure results in a lighter image as even some of the developed silver may be affected. Other options, such as overdeveloping, directly putting in fixer, or sunlight exposure, typically lead to other issues like dark films or fogging.
According to the American Society of Aneasthesiologists, the physical status of a patient with mild systemic disease that limits activity but no incapacitating may be classified as
1. ASA I
2. ASA II
3. ASA III
4. ASA IV
Radiology
Answer: 3
According to the American Society of Anesthesiologists, the physical status of a patient with mild systemic disease that limits activity but is not incapacitating may be classified as ASA II.
Which of the following is the correct sequence of dark room processing of a radiograph
1) Rinsing, fixing, developing, washing and drying
2) Developing, rinsing, fixing, washing and drying
3) Washing, fixing, developing, drying and rinsing
4) None of the above
Radiology
Answer: 2
The traditional darkroom processing sequence for radiographs is as follows:
Developing: This step involves immersing the film in a
developing solution to reveal the latent image captured on the film.
Rinsing: This step is crucial to halt the development
process, preventing further exposure to the chemical in the developer.
Fixing: The film is then placed in the fixer solution
to stabilize the image and make it insensitive to light.
Washing: The film must be washed to remove any residual
chemicals before drying.
Drying: Finally, the film is dried for use.
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.
Cornoid process of mandible can be best viewed on
1. PA view of skull
2. Towne"s projection
3. Lateral view of skull
4. Wasters view
Radiology
Answer: 1
The coronoid process of the mandible can be best viewed on PA view of skull.
A 60-year-old male reports for denture adjustment. His OPG show 1 cm lytic area in the lower bicuspid region. The most probable diagnosis is
1. Residual cyst
2. Hyperparathyroidism
3. CA prostate
4. Any one of the above
Radiology
Answer: 4
A 60-year-old male with a 1 cm lytic area in the lower bicuspid region on OPG has a most probable diagnosis of any one of the above.
The ingredient of the fixing solution of the X-ray is
1) Hydroquinone
2) Elon
3) Sodium bisulphate
4) Acetic acid
Radiology
Answer: 4
Acetic acid is a key ingredient in the fixing solution used in radiography. It acts as a stop bath, neutralizing the developer and maintaining the acidic environment necessary for proper fixation. Hydroquinone and elon are developer agents, while sodium bisulfate is not typically part of the fixing process.