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Which of the following are correct with regard to X-ray production? a. Increasing the tube voltage increases the heat production at the target b. Reducing the actual focal spot reduces the heat load on the target c. Increasing the target angle increases the target heat rating for a given effective spot size d. Increasing the target angle increases the effective focal spot e. A rotating anode can take a higher heat load than a stationary anode |
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Answer» a. True. Increasing the tube voltage increases the kinetic energy of the electrons, the majority of which is lost as heat on collision with the target. b. False. This results in the heat being spread over a reduced area. c. False. The target angle is the angle between the target and the central photon beam. Reducing the target angle for a given spot size increases the area that the heat is spread over and therefore improves its heat rating. d. True. e. True. A rotating anode results in the heat being spread over a larger area and is one of the methods used to reduce target heating. |
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