What happens when the exposure button is pushed on a dental x-ray machine?

Study for the Dental Radiology Foundation Chain and Physics Test. Enhance your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

What happens when the exposure button is pushed on a dental x-ray machine?

When you press the exposure button, the high-voltage circuit is activated and applies kilovoltage across the x-ray tube. This creates a strong electric field that accelerates electrons emitted from the heated filament (the cathode) toward the tungsten target (the anode). When those fast electrons collide with the target, x-ray photons are produced and exit through the tube window toward the patient. The exposure button doesn’t cause the filament to cool and stop emitting, nor does it automatically adjust the beam direction—that’s set by the operator through positioning and collimation. The glass window sealing isn’t tightened by the button press either.

When you press the exposure button, the high-voltage circuit is activated and applies kilovoltage across the x-ray tube. This creates a strong electric field that accelerates electrons emitted from the heated filament (the cathode) toward the tungsten target (the anode). When those fast electrons collide with the target, x-ray photons are produced and exit through the tube window toward the patient. The exposure button doesn’t cause the filament to cool and stop emitting, nor does it automatically adjust the beam direction—that’s set by the operator through positioning and collimation. The glass window sealing isn’t tightened by the button press either.

More practice questions