MEDICINE
RADIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
decreased density, high contrast
|
|
|
decreased density, low contrast
|
|
|
increased density, high contrast
|
|
|
increased density, low contrast
|
Detailed explanation-1: -The first experiment showed that, when the film density is kept constant, the higher the kVp, the lower the resolution and image contrast percentage; also, the higher the mAs, the higher the resolution and image contrast percentage.
Detailed explanation-2: -A higher kVp will make the x-ray beam more penetrating. It will also result in less difference in attenuation between the different parts of the subject, leading to lower contrast.
Detailed explanation-3: -As kVp goes up, radiographic contrast goes down. Increasing kVp also contributes to the overall density (darkness) of the image. A fairly small adjustment in kVp can have a significant effect on the image. Just a 15% increase in kVp is roughly equivalent to doubling the mAs.