Abstract: A computer-implemented method of planning orthopaedic surgery comprises providing a library of templates representing orthopaedic prostheses, displaying and scaling one or more patient images such as X-ray images, allowing a user to reconfigure geometrical constructs displayed over the images to match the construct to anatomical features shown in the image; and selecting one or more templates from the library in accordance with parameters of the reconfigured constructs. The templates correspond to the orthopaedic prosthesis or prostheses which are most suitable for the patient. Hip replacement surgery can be planned using a single patient image. Knee surgery can be planned using two patient images showing different views of the anatomical features, in which case geometrical constructs for use with each view are provided. The library of templates is accessible via the Internet so as to be accessible by users in any location and readily updateable.

Abstract: A computer-implemented method of planning orthopaedic surgery comprises providing a library of templates representing orthopaedic prostheses, displaying and scaling one or more patient images such as X-ray images, allowing a user to reconfigure geometrical constructs displayed over the images to match the construct to anatomical features shown in the image; and selecting one or more templates from the library in accordance with parameters of the reconfigured constructs. The templates correspond to the orthopaedic prosthesis or prostheses which are most suitable for the patient. Hip replacement surgery can be planned using a single patient image. Knee surgery can be planned using two patient images showing different views of the anatomical features, in which case geometrical constructs for use with each view are provided. The library of templates is accessible via the Internet so as to be accessible by users in any location and readily updateable.

Abstract: A method for providing electrical insulation to electrical devices (e.g. connectors) disposed at the end of the housing of a logging sonde designed to be lowered in a borehole traversing earth formation, wherein the housing is at least partly filled in with an insulating fluid having a density greater than the borehole fluid density. Advantageously, the insulating fluid density is greater than the density of water. Preferably, the housing is filled with a mix of insulating oil and hydraulic oil having a density less than the insulating oil density. The amount of insulating fluid is such that it covers the electrical devices when the sonde is substantially in the upright position. The insulating fluid is e.g. made of a fluorinated organic compound, such as the oil sold under the name Fluorinert.RTM. (trademark of 3M).