The automatic exposure control forms used by the mammography machine are as follows

1. Automatic mode: This mode depends on the built-in sensor and control system of the machine, and can automatically adjust the exposure parameters according to the thickness, density and position of the breast to ensure the image quality.

2. Semi-automatic mode: This mode requires some manual intervention. For example, the photographer can set the initial exposure parameters, and then the machine will automatically adjust according to the thickness, density and position of the breast.

3. Fully automatic mode: This mode depends entirely on the sensor and control system built in the machine. Without manual intervention, the machine will automatically adjust the exposure parameters according to the thickness, density and position of the breast to ensure the image quality.