The present application belongs to the field of C-arm
machine structure, and particularly relates to a C-arm
machine laser pre-alignment
system and application thereof. The present application combines hardware sensor sampling and
software closed-
loop control to establish a dynamic
projection model capable of real-
time changes with the tube height (D, i.e. focal distance) and the beam
limiter opening (L), to achieve three core goals of real-time display of the shooting boundary, adaptive compensation of the focal distance, and
elimination of
parallax error: the real-time display of the boundary can directly project a rectangular
wire frame corresponding to the current
irradiation parameters on the patient's
body surface, the adaptive compensation of the focal distance uses a professional
ranging algorithm to detect the tube height in real time and dynamically adjust the
laser indication range, to ensure that the
laser frame and the X-
ray beam edge are accurately overlapped; the
parallax error is corrected by a special
software algorithm to correct the geometric offset, to ensure that the laser indication center and the X-
ray center are always consistent, to help the doctor accurately grasp the
shooting range; and finally to improve the shooting positioning accuracy, to ensure the diagnosis efficiency and accuracy.