X-ray imaging system and X-ray imaging method

An X-ray imaging system, comprising:

• an exposure assembly including an X-ray source, a detector, and a collimator, the collimator having an opening for controlling a collimation region;
• a camera unit aligned with the detector for acquiring a real-time optical image of a subject under examination, the real-time optical image including a center of the collimation region;
• a display unit operably connected to the camera unit, the display unit including a user interface configured to display the real-time optical image;
• an input unit operably connected to the display unit, the input unit configured to receive an operation of a user and form a target region on the user interface by changing a position of the center of the collimation region or re-framing a region of the collimation region;
• and
• a control unit operably connected to the exposure assembly, the control unit configured to control, based on the target region, automatic movement of the X-ray source and the detector to align with a center of the target region, and control the opening of the collimator such that the collimation region is aligned with the target region,
• wherein the camera unit is mounted on a side of the collimator, and there is a fixed first angle between the camera and the side of the collimator, the control unit being capable of calculating an offset between the center of the collimation region on the real-time optical image and the center of the real-time optical image based on the fixed first angle, an offset between the camera unit and the collimator, and thickness information of the subject under examination to calibrate the center of the collimation region.

An X-ray imaging system, comprising:

• an exposure assembly including an X-ray source, a detector, and a collimator, the collimator having an opening for controlling a collimation region;
• a camera unit aligned with the detector for acquiring a real-time optical image of a subject under examination, the real-time optical image including a center of the collimation region;
• a display unit operably connected to the camera unit, the display unit including a user interface configured to display the real-time optical image;
• an input unit operably connected to the display unit, the input unit configured to receive an operation of a user and form a target region on the user interface by changing a position of the center of the collimation region or re-framing a region of the collimation region;
• and
• a control unit operably connected to the exposure assembly, the control unit configured to control, based on the target region, automatic movement of the X-ray source and the detector to align with a center of the target region, and control the opening of the collimator such that the collimation region is aligned with the target region,
• wherein the input unit is configured to move, and wherein during movement of the input unit, the display unit displays in real time on the real-time optical image, based on a starting point inputted by the input unit, a reference region formed by a temporary end point, and, after an input of an end point is determined, the collimation region automatically aligns with the target region framed by the starting point and the end point.