Method for monitoring a surgical intervention with X-ray imaging, and medical X-ray system

A method for monitoring a surgical intervention with an X-ray imaging device by way of a recording system of the X-ray imaging device that is adjustable into different angulations, having an X-ray source and an X-ray detector, during which intervention in an anatomy of an examination object, an implant having a tip is moved forward along a movement axis with the tip foremost, the method comprising:

• recording a first projection image, by the X-ray imaging device, of the implant in the anatomy of the examination object in a first angulation;
• recording a third projection image, by the X-ray imaging device, of the implant in the anatomy of the examination object in a third angulation after a forward movement of the implant along the movement axis;
• establishing an advanced position of the tip of the implant in the third projection image;
• establishing a first epipolar line for the advanced position of the tip in the first projection image by an epipolar geometry determined by way of the first angulation and the third angulation;
• and
• simultaneously displaying the first projection image and the third projection image, wherein the first epipolar line is shown in the first projection image.