Foreshortening of radiographic image results when central X-ray is 1) Parallel to object and film 2) Parallel to object but not to film 3) Perpendicular to film but not to object 4) Perpendicular to object but not to film
RadiologyAnswer: 3
Sharpness of image on the film can be increased by 1) Large focal spot 2) Small focal spot 3) Decreased target-skin distance 4) Increased film-object distance
RadiologyAnswer: 2
Half value layer refers to 1) The rate at which an X-ray photon transfer"s the energy to irradiated matter 2) The thickness of a substance required to reduce the number of X-ray photons by half 3) Both the above 4) None of the above
RadiologyAnswer: 2
At 80 kVp and 15 mA and target film distance of 8 cm, exposure time is 8 seconds. The exposure time at 4 cm is 1. 4 seconds 2. 2 seconds 3. 1 second 4. 1/4 second
RadiologyAnswer: 2
In treatment of oral cancers, the fraction of total dose given in each appointment is in the range of 1) 150 rad 2) 300 rad 3) 400 rad 4) 500 rad
RadiologyAnswer: 1
Higher kVp is 1) Disadvantageous to film 2) Disadvantageous to patient 3) Advantageous to film 4) All of the above
RadiologyAnswer: 1
In radiography "latent image period" is the period between 1) Subsequent doses of radiation 2) Exposure of film and development of image 3) Exposure to X-rays and development of radiographic image 4) None of the above
RadiologyAnswer: 3
Fogging on the radiographs is the result of 1) Increase in humidity 2) Scattered radiation 3) Overdevelopment 4) All of the above
