BONE LENGTH DETERMINATION

摘要

A method and a device are provided, for measuring an actual length of a fractured bone based on 2D fluoroscopic images of proximal and distal sections of the bone, each of the images including a reference body. Based on the images, a spatial position of a first end point and a spatial position of a second end point are determined, taking into account dimensions taken from a bone model of a bone corresponding to the imaged bone and the spatial positions of the reference bodies. The actual length of the fractured bone is defined as the distance between the two end points.

主权项

1. A method for measuring an actual length of a fractured bone, wherein an implant is already introduced into the fractured bone, wherein a first reference body and a second reference body are already arranged in a predetermined relation to the implant, the method comprising the steps of:
receiving a first 2D fluoroscopic image including the first reference body and a first bone feature; determining a first spatial relation between the first reference body and a first end point at the first bone; receiving a second 2D fluoroscopic image including the second reference body and a second bone feature; determining a second spatial relation between the second reference body and a second point (P) at the second bone feature; receiving data of a bone model having corresponding first and second bone features, determining a third spatial relation between the second point (P) of the second bone feature and a second end point (EP1) at the bone model; and determining the actual length of the fractured bone based on the first, second, and third spatial relation, and on the predetermined relation of the reference bodies to each other.