Patent application number | Description | Published |
20130083984 | METHOD AND SYSTEM OF AUTOMATIC DETERMINATION OF GEOMETRIC ELEMENTS CHARACTERIZING A BONE DEFORMATION FROM 3D IMAGE - The invention relates to a method for automatically determining, on a bone comprising a head portion contiguous to a neck portion, parameters for characterizing a bump deformation on the head-neck junction of the bone from acquired 3D medical image, the method comprising the following steps: i) constructing a 3D surface model of the bone; ii) fitting a sphere on the spherical portion of the head of the bone; iii) determining a neck axis characterizing the neck portion of the bone; iv) determining from the fitted sphere and the neck axis, a clock face referential on the head of the bone rotating around the neck axis; v) determining a 3D curve on the 3D surface model characterizing the head-neck junction of the bone; vi) determining, from the 3D curve, the summit of the bump deformation of the head-neck junction of the bone; vii) determining, from said summit of the bump deformation, first and a second parameters (α3D, iMax) characterizing the maximum bump deformation of the head-neck junction of the bone. | 04-04-2013 |
20130085723 | METHOD FOR DETERMINING ARTICULAR BONE DEFORMITY RESECTION USING MOTION PATTERNS - The invention relates to a method for real-time determination an optimal corrected surface of a first bone and/or a second bone forming together an articulation, the first and/or second bones presenting an overgrowth deformation, said corrected surface providing a greater range of motion of the articulation, the method comprising the following steps: i) constructing from acquired images of the articulation 3D voxel models of the first bone and the second bone; ii) for each of first and second bone voxel models, constructing a coordinate system defmed by a center and three axes; iii) applying a motion pattern on the coordinate system of the second bone with respect to the coordinate system of the first bone, a motion pattern being a set of contiguous positions of the first or second bone coordinate systems with respect to the other bone coordinate system, the contiguous positions defining a movement of one bone with respect to the other, wherein said motion pattern is initially loaded from a data base of pre-defined motion patterns; iv) determining a resection volume from said motion pattern as being the union of interpenetration volumes of the first or second bone voxel model with the other bone voxel model for each position of the motion pattern; v) determining the optimal corrected surface by virtually removing said resection volume from the first and/or the second bone voxel model. | 04-04-2013 |
20130089253 | METHOD FOR DETERMINING BONE RESECTION ON A DEFORMED BONE SURFACE FROM FEW PARAMETERS - The invention relates to a method for non-invasive reproducible determination of a corrected surface on a 3D bone surface model constructed from 3D medical image of a bone having a deformation consisting in a bump overgrowth at the head-neck junction; wherein said corrected surface comprises: i) a 3D spherical corrected surface patch on the head portion of said 3D bone surface model, and ii) a 3D smooth transition corrected surface patch on the neck portion of said 3D bone surface model, contiguous to said 3D spherical corrected surface patch; Said corrected surface patches are defined by a set of parameters comprising: iii) at least one first parameter (a*) representing a spherical extent value of said 3D spherical corrected surface patch, iv) and a set of at least one second parameter, said set determining the 3D correction boundary of said corrected surface patches, such that said corrected surface patches are continuous with said 3D bone surface model along said boundary. | 04-11-2013 |
20150049928 | METHOD AND SYSTEM OF AUTOMATIC DETERMINATION OF GEOMETRIC ELEMENTS CHARACTERIZING A BONE DEFORMATION FROM 3D IMAGE - The invention relates to a method for automatically determining, on a bone comprising a head portion contiguous to a neck portion, parameters for characterizing a bump deformation on the head-neck junction of the bone from acquired 3D medical image, the method comprising the following steps: i) constructing a 3D surface model of the bone; ii) fitting a sphere on the spherical portion of the head of the bone; iii) determining a neck axis characterizing the neck portion of the bone; iv) determining from the fitted sphere and the neck axis, a clock face referential on the head of the bone rotating around the neck axis; v) determining a 3D curve on the 3D surface model characterizing the head-neck junction of the bone; vi) determining, from the 3D curve, the summit of the bump deformation of the head-neck junction of the bone; vii) determining, from said summit of the bump deformation, first and a second parameters (α3D, iMax) characterizing the maximum bump deformation of the head-neck junction of the bone. | 02-19-2015 |
20150269727 | METHOD FOR DETERMINING BONE RESECTION ON A DEFORMED BONE SURFACE FROM FEW PARAMETERS - The invention relates to a method for non-invasive reproducible determination of a corrected surface on a 3D bone surface model constructed from 3D medical image of a bone having a deformation consisting in a bump overgrowth at the head-neck junction; wherein said corrected surface comprises: i) a 3D spherical corrected surface patch on the head portion of said 3D bone surface model, and ii) a 3D smooth transition corrected surface patch on the neck portion of said 3D bone surface model, contiguous to said 3D spherical corrected surface patch; Said corrected surface patches are defined by a set of parameters comprising: iii) at least one first parameter (a*) representing a spherical extent value of said 3D spherical corrected surface patch, iv) and a set of at least one second parameter, said set determining the 3D correction boundary of said corrected surface patches, such that said corrected surface patches are continuous with said 3D bone surface model along said boundary. | 09-24-2015 |
Patent application number | Description | Published |
20090320452 | METHOD FOR DETERMINING THE AMOUNT OF PARTICULATE ACCUMULATED IN A PARTICULATE FILTER - A method for determining the amount of particulate that has accumulated in a particulate filter, comprising calculating an amount of particulate that has accumulated in the particulate filter on the basis of a physical model that uses measured and/or determined physical quantities, and subjecting the calculated particulate amount to validation on the basis of given validation criteria, the latter step envisaging validation of the calculated particulate amount in the case where said criteria are satisfied, and validation of a substitutive particulate amount which is a function of a previously validated amount and of an admissible rate of variation in the case where said criteria are not satisfied. | 12-31-2009 |
20120022763 | INTERNAL EXHAUST GAS RECIRCULATION CONTROL IN AN INTERNAL COMBUSTION ENGINE - An automotive electronic control unit for an internal combustion engine comprising at least one cylinder provided with at least one intake valve and at least one exhaust valve, and a variable intake and/or exhaust valve actuation system. The electronic control unit is programmed to control the variable valve actuation system so as to obtain an internal exhaust gas recirculation through the intake and exhaust valves and to control the internal exhaust gas recirculation based on a mathematical model that models the fluid-dynamic behaviour of an intake or exhaust valve as if this was a nozzle. | 01-26-2012 |
20130074806 | FUEL INJECTION RATE SHAPING IN AN INTERNAL COMBUSTION ENGINE - A fuel injection system for an internal combustion engine, comprising at least one fuel electroinjector, and an electronic control unit configured to supply the fuel electroinjector, in a fuel injection phase in an engine cylinder, with at least a first electrical command to cause a first fuel injection to be carried out, and a second electrical command cause a second fuel injection temporally subsequent to the first fuel injection to be carried out, the first and second electrical commands being separated in time by an electrical dwell time such that the second fuel injection starts without any discontinuity in time with respect to the first fuel injection. The electronic control unit is further configured to cause the first and second fuel injections to be carried out in engine operating conditions characterized by reduced fuel ignition delays, wherein fuel combustion is prevalently diffusive and heat released during fuel combustion is sensitive to fuel injection law. | 03-28-2013 |