1.

Regarding collimation: a. It allows the operator to adjust the filtration of the X-ray beam b. It employs a light beam diaphragm c. The collimators are constructed of material that is highly attenuating to X-rays d. It reduces scatter e. It does not affect the effective dose to the patient

Answer»

a. False. It allows adjustment of the beam size. It has no effect on filtration. 

b. True. This is a light source that projects as though it originated from the X-ray focus, allowing the operator to see the position of the beam projected onto the patient. 

c. True. 

d. True. Less tissue is irradiated by directing the X-ray beam onto a smaller target area. 

e. False. It decreases the volume of tissue irradiated and the radiation dose.



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