Which of the following statements is true regarding collimat…
Which of the following statements is true regarding collimators? The bottom shutters of the collimator reduce penumbra because of their greater distance from the focal spot. The bottom shutters of the collimator reduce off-focus radiation because of their greater distance from the focal spot. The upper shutters of the collimator reduce penumbra because of their proximity to the x-ray tube. The upper shutters of the collimator reduce off-focus radiation by absorbing this radiation before it exits the tube.
Read Details