What the factor effect in the resouluation and contrast of the image:
- a- Size use in theTarget
- b- Quantaty of radiation
- c- F.F.D
- d- All of the above
The correct answer is: d. All of the above.
Here's why each factor affects resolution and contrast:
a. Size used in the Target:
The size of the target area (detector) directly affects resolution. A smaller target area results in higher resolution, meaning it can capture finer details. However, it also decreases sensitivity to radiation, which can affect contrast.
b. Quantity of radiation:
The amount of radiation received by the detector affects both resolution and contrast. Higher radiation exposure generally leads to better resolution and higher contrast, but too much radiation can lead to noise and artifacts, degrading both.
c. F.F.D (Focus-to-Film Distance):
This distance between the X-ray source and the detector affects both geometric magnification and sharpness. A shorter FFD results in higher magnification but can blur the image, decreasing resolution and contrast. Conversely, a longer FFD reduces magnification but improves sharpness, potentially improving both resolution and contrast.
Therefore, all of these factors play a role in determining the resolution and contrast of an image. The ideal combination depends on the specific imaging situation and the desired outcome.
