DEVICE FOR VISUAL MEASUREMENT OF DIMENSIONS

摘要

A device for direct, visual estimation of dimensions of measurement objects that are difficult to reach, such as organs and foreign articles within human and animal bodies. The invention is founded on the fact that the human eye gives a strikingly good size apprehension when comparing a measurement object with a similar thing of known dimension close to that of the measurement object. The comparison can preferably be carried out on an X-ray picture in which a measurement object as well as a comparison body are reproduced close to each other and preferably on the same scale. Means are provided for fixing the comparison body at the surface/exterior of the human or animal body. The comparison body (10) is confined by a series of surfaces of revolution with different sizes within an interval matched to the dimension interval of the measurement objects. The form of the surfaces of revolution is matched to the form of the measurement objects. Thus cylindrical surfaces of revolution are chosen if the measurement object is cylindrical and spherical surfaces of revolution if the measurement object is globular.