Operating method for medical imaging system, and medical imaging system

A medical imaging system, comprising:

• an imaging device including an X-ray source and a detector, wherein the X-ray source and the detector are capable of cooperating to acquire a medical image of a subject under examination;
• a camera operably connected to the imaging device for capturing the subject under examination to obtain a captured image including the subject under examination;
• a display operably connected to the camera for displaying a graphical user interface including the captured image, and a first boundary indication and a second boundary indication for superimposing and displaying an exposure region on the captured image;
• an input device operably connected to the display for receiving an input operation for adjusting a position of the first boundary indication and an input operation for adjusting a position of the second boundary indication;
• and
• a controller for determining the position of the first boundary indication and the position of the second boundary indication according to the input operations received by the input device, and determining a position of an anatomical site corresponding to the position of the first boundary indication and the position of the second boundary indication in the captured image,
• wherein when the position of the anatomical site changes in the captured image, the position of the first boundary indication and the position of the second boundary indication change.