American Society of Radiologic Technologist (ASRT) Practice Exam

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Prepare for the American Society of Radiologic Technologist Exam. Utilize flashcards and multiple-choice questions, with hints and explanations for each. Boost your confidence and ensure success!

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The negative side of the x-ray tube is known as the:

anode
focusing cup
cathode
rotor

The correct answer is: cathode

The negative side of the x-ray tube is known as the cathode. The cathode is responsible for producing electrons when heated, which are then directed toward the anode, the positive side of the x-ray tube, to produce x-rays. The cathode consists of a filament and a focusing cup. The filament is heated to incandescence, emitting electrons through thermionic emission. The focusing cup helps direct these electrons toward the anode, thereby increasing the efficiency of x-ray production. Understanding the roles of the cathode and the anode in x-ray tube operation is crucial for radiologic technologists, as it informs them about the mechanics of x-ray generation and the importance of maintaining the proper functioning of these components.