In most X-ray imaging using a continuous X-ray source, there is no need to synchronize the detector with the X-ray source during use. However, in general, when using a pulsed X-ray source that emits a high radiation dose in a short time compared to continuous X-ray sources, the detector must be synchronized with the emission timing of the X-ray source to acquire an image.

If using a flat panel sensor with a pulsed X-ray source, then setting the flat panel sensor to external trigger mode will be convenient. In external trigger mode, inputting an external trigger signal to the flat panel sensor allows reading out the charges that have been kept accumulated in the photodiodes up until then. The charges are in this case continually accumulated until an external trigger signal is input. 

To acquire an image in synchronization with the pulsed X-ray source, the X-ray source must emit X-rays at the appropriate trigger intervals.

Here, an external trigger signal is input prior to pulsed X-ray emission, and starts readout of charges integrated in the photodiodes up until that time (). 

Readout of the integrated charges ends after Tprdy from the rising edge of the external trigger signal (), and the photodiodes are reset. Refer to the datasheet for information on other parameters.