| 摘要 |
<p>An alignment apparatus, the apparatus comprising positioning means supporting a linear cannula or guide, and adapted to position the cannula or guide, the cannula or guide, or an optional linear, a probe within the cannula, having an end and having at least one point marked thereon so as to be visible in an X-ray image thereof, an X-ray apparatus adapted to take X-ray images in two orthogonal planes, a display adapted to display said X-ray images, means to identify, on the displayed images, a line with which the probe is to be aligned, the display being associated with a computer, means being provided to store, in the memory of the computer, data concerning specific selected points on the display, which points comprise at least points present on the image of the probe present on the display and points present on a line on the display with which the probe is to be aligned, the computer being adapted to determine the movement to be effected by the positioning means to align the cannula with the desired line. <IMAGE></p> |
