Automatic exposure control method and system for X-ray

An automatic X-ray exposure control method, comprising:

• turning on a flat-panel detector, setting parameters of the flat-panel detector, and selecting one or more exposure radiation fields of the flat-panel detector;
• testing a corresponding exposure dose obtained by scanning the exposure radiation fields of the flat-panel detector in real time, and determining that an exposure has started in response to determining the tested exposure dose is greater than a first preset threshold;
• configuring the flat-panel detector such that it enters an automatic exposure control mode in response to determining the exposure is started, wherein
• the flat-panel detector tests an exposure dose rate, determines the corresponding exposure dose in real time, predicts the corresponding exposure dose after a preset delay duration to obtain a predicted exposure dose based on the corresponding exposure dose in real time, the exposure dose rate, and the preset delay duration, and triggers a cut-off signal in response to determining the predicted exposure dose reaches an exposure dose threshold;
• and
• configuring the flat-panel detector such that it triggers an image acquisition in response to determining the exposure is completed;
• wherein the first preset threshold is greater than or equal to zero.