In accordance with the present invention, a method for determining a centerline through a region of interest in a 3D image dataset is provided. The method includes identifying the boundaries of the region of interest and identifying the endpoints of the region of interest. For those points within the boundaries, a penalty value which is a function of the proximity of the point to a boundary is determined. A centerline is then identified by the path connecting the endpoints which has the minimum ...

There is described a photogrammetric method and an arrangement for the three-dimensional digitizing of bodies and body parts (26) which are covered with a marked, elastic cover (14), which comprises high-contrast marks which are photogrammetrically analysable, and which are photographed from different shooting positions. For the purpose, at least one camera (22) is moved around the body with a simple, inaccurate guide and images overlapping each other are taken from different positions in space ...

The invention relates to an image processing method for displaying a processed image of a three dimensional (3-D) object using a two-dimensional display means and for interacting with the surface of the displayed 3-D object comprising the construction and display of at least two coupled views of the surface of the 3-D object, including a global 3-D view and a connected local 2-D view of the surface of said object on which local interactions are made. This method further comprises interactive nav...

Methods are described for efficient reconstruction of MRI data. In one practice, new reconstruction algorithms for non-uniformly sampled k-space data are presented. In the disclosed algorithms, Iterative Next-Neighbor re-Gridding (INNG) and Block INNG (BINNG), iterative procedures are performed using larger rescaled matrices than the target grid matrix In BINNG algorithm, the sampled k-space region is partitioned into several blocks and the INNG algorithm is applied to each block. In another pra...

A three-dimensional-based modeling method and system designed for dentistry and related medical (and appropriate non-medical) applications. Data capture means produces a point cloud representing the three-dimensional surface of an object (e.g., dental arch). Three-dimensional recognition objects are provided, particularly within those areas in the image field that have low image definition, and particularly in such of these areas that appear in overlapping portions of at least two images, to pro...

A mounting and protective means for use in force measuring or weighing devices comprising a load carrier and a load transmitting means. Its purpose is to facilitate the mounting of the carrier and the transmitting means and to constitute a limiter for lateral displacements in the plane perpendicular to the load action line of the carrier. The mounting and protective means comprises two parts which at measuring are in contact with the transmitting means, one of the parts being also connected to t...

A device is provided for the protection of wounds comprising a shallow perforated bowl of substantially semicircular cross-section terminating at its edges in substantially flat rim portions and constructed of thermoplastic material selected from the group consisting of polyethylene, polypropylene and high pressure polypropylene or such stiffness that deflection thereof by a load of 1 kg applied from the convex side to the bowl throughout its bottom surface is less than the height of the bowl me...

A bandage construction that includes a sterile pad of a hygroscopic material is sufficiently porous to admit air therethrough, the pad being covered on the surface facing the wound with a layer of a soft non-woven fabric. A strip-like element is adhered over the outwardly directed surface of the pad and has portions thereof extending beyond each end of the pad, and a width that is substantially identical to that of the pad. The pad is constructed of a cellular plastic foam which is hygroscopic, ...

A process for the production of an expandable silicone resin includes reacting a substantial amount of the silanol (SiOH) groups present in the resin to form siloxane bonds and water, and heating the resin to a temperature above the resin's melting point, at which chemical reaction (condensation) of the silanol groups occur. The reaction increases the molecular weight of the resin and decreases the amount of water that must be removed during a subsequent foaming step, thereby controlling the rat...

A method and system for determining the position and orientation of an object is disclosed. A set of markers attached or associated with the object is optically tracked and geometric translation is performed to use the coordinates of the set of markers to determine the location and orientation of their associated object.