What is the part of the x-ray unit from which the x-ray beam is emitted?

• A. X-Ray Tubehead
• B. X-ray Console
• C. Radiation Shield
• D. Exposure Button

Answer: (A)

The beam comes from the X-ray tubehead. Inside the tubehead sits the x-ray tube itself, where electrons produced at the cathode are accelerated toward the anode; when they hit the target, x-rays are generated and exit through the tube window. The tubehead also houses the collimator or cone to shape and limit the beam to the desired size, which helps protect the patient and improve image quality. The x-ray console is used to select exposure factors and start the exposure, but it does not emit rays. The radiation shield provides protection to the operator, and the exposure button simply triggers the exposure. So, the part from which the x-ray beam is emitted is the X-ray tubehead.