Quality of imaging in fluoroscopy

[Taylor_1989]

Homework Statement

Explain the effect expected on the quality of imaging if an X-ray fluoroscope system is adjusted so that it:

a) uses higher kilo voltage

b) reduces the dose-rate to the detector and

c) delivers radiation in pluse rather than continuously

Homework Equations

The Attempt at a Solution

For
a) The higher the Kv the less contrast and the more signal noise, due to less photoelectric absorption and more Compton scattering

b) As dose rate is being decreased then the image will not be as bright and the image will be blurry, as there are less photos hitting detector.

My justification for b) is that if I think of placing a block of wood in front of a large white piece of paper and then fire say 1000 paint balls at it, in and hour , and then re create the same situation and fire say 2000 paint balls at it in and hour the, my second experiment will give a more detailed and (brighter) shape than my previous experiment.

c) The pulse radiation allow for more dose compare to continuous, so there would be an improved contrast and also an increase in spatial resolution.

I think my ans is correct for a) but b) and c) I am not too sure, is there any suggestions that anyone could make to my ans.

Thank in advance.

 

[anathema]

Your answer for a) is correct. For b), your analogy with the paint balls is a good way to think about it. A lower dose rate means fewer photons are hitting the detector, resulting in a less detailed and darker image. This is because the detector is not receiving as much information to create the image.

For c), the pulse radiation does indeed allow for more dose, but it also allows for more control over the timing of the radiation. This means that the detector can be exposed to radiation only when it is necessary, resulting in a clearer and less noisy image. Additionally, the pulses can be adjusted to optimize the contrast and spatial resolution, resulting in an overall improvement in image quality.