INBDE (Integrated National Board Dental Examination) Practice Exam

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The aluminum in an X-ray tube is used for what purpose?

Collimation
Filtration
Producing electrons
Converting electrons to X-ray photons

The correct answer is: Filtration

Aluminum is used in an X-ray tube for the purpose of filtration. This helps to remove low-energy x-rays and only allows higher energy x-rays to be used in imaging. Collimation (option A) is the process of restricting the size of the x-ray beam, but it does not involve the use of aluminum. Producing electrons (option C) is a step in the production of x-rays, but not specific to the use of aluminum. Converting electrons to x-ray photons (option D) is an essential step in the production of x-rays, but it does not involve the use of aluminum specifically for filtration. Therefore, filtration (option B) is the most accurate and appropriate answer.