Which term is used as the abbreviation for exposure time on the dental x-ray control panel?

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Exposure time is the duration the X-ray beam is energized, and it’s shown on the dental x-ray control panel as seconds or impulses. This is the standard way to express how long the exposure lasts, and the abbreviation used is s. The other terms refer to different things: milliampere is the tube current, not the time; kilovoltage is the beam’s energy, not the duration; using a generic Time (t) isn’t the panel’s common abbreviation. So the correct term is seconds or impulses, abbreviated s, reflecting the actual length of exposure.