Abstract:
Certain aspects of the present disclosure generally relate to additive manufacturing, and more particularly, to methods and apparatus for heating during additive manufacturing. An example method that may be performed by an additive manufacturing apparatus generally includes dividing a heating area into a plurality of strips, the heating area defined in a layer of build material; randomly assigning indices to the plurality of strips; and applying energy by an energy source to the layer of build material across each of the plurality of strips in order of the randomly assigned indices.
Abstract:
Certain embodiments provide a system for calibrating an X-ray image. The system may receive an X-ray image of an anatomical part of a patient. The system may further receive a 3-D surface scan of a surface of the patient where the anatomical part is located. The system may derive a measurement correction to apply to measurements of the X-ray image based on the 3-D surface scan. The measurement correction may account for: an orientation of the patient with respect to the X-ray detector plate, a first distance between the patient and the detector plate, or a second distance between the patient and an X-ray source used to generate the X-ray image. The system may further determine a corrected measurement of the anatomical part based on the measurement correction and a measurement taken from the X-ray image.
Abstract:
The present disclosure relates to design and manufacture of 3D identification labels manufactured by agent-assisted fusion (AAF) techniques. Methods disclosed herein optimize the contrast between raised or engraved surfaces on a 3D identification label and minimize the effects of the dark-colored fusing agents used in AAF. Methods are disclosed for designing labels based on a configuration of light source and label detector.
Abstract:
Systems and methods of radiograph correction and visualization are disclosed. Certain embodiments provide a method for generating a 3D model of at least part of one anatomical object based on one or more radiographs. The method further includes positioning the 3D model based on information indicative of a normalized projection comprising information indicative of a desired position and orientation of the at least part of one anatomical object with respect to the projection plane. The method further includes generating a 2D projection of the 3D model onto the projection plane. The method further includes generating one or more modified radiographs of the at least part of one anatomical object based on the 2D projection.
Abstract:
Systems and methods of radiograph correction and visualization are disclosed. Certain embodiments provide a method for generating a 3D model of at least part of one anatomical object based on one or more radiographs. The method further includes positioning the 3D model based on information indicative of a normalized projection comprising information indicative of a desired position and orientation of the at least part of one anatomical object with respect to the projection plane. The method further includes generating a 2D projection of the 3D model onto the projection plane. The method further includes generating one or more modified radiographs of the at least part of one anatomical object based on the 2D projection.
Abstract:
A system and method for preheating of portions of building material in an additive manufacturing environment is provided. Various embodiments involve the use of a container (502A, 502B, 902, 1002, 1102) configured to preheat an aliquot of building material (502A, 502B, 900, 1002, 1102). In certain embodiments, the container (502A, 502B, 902, 1002, 1102) is configured to move along a building platform of an additive manufacturing device and further deposit building material on different sides of the building platform and further on different sides of a recoating mechanism (415A, 415B, 515, 915, 1015, 1115) of the additive manufacturing device.
Abstract:
Described herein are data processing apparatuses and methods for processing data relating to at least part of a three dimensional object for additive manufacturing. The apparatuses and methods, for example, relate to processing surface precursor data indicative of at least one characteristic for use in defining a surface of the at least part of the three dimensional object.
Abstract:
Systems and methods for designing and generating a device using accuracy maps and stability analysis are disclosed herein. In some aspects, the systems and methods described relate to an apparatus for designing a device. The apparatus includes a processor configured to generate a three-dimensional model of a physical object and determine whether the three-dimensional model satisfies an accuracy threshold based on an accuracy map. The processor is further configured generate a simulated representation of the device, determine whether the simulated representation of the device satisfies a stability threshold, simulate a fit of the device on the three-dimensional model if the simulated representation of the device satisfies the stability threshold, and determine whether the simulated fit of the device on the three-dimensional model is within a tolerance threshold. The processor is further configured to generate an approved design of the device if the simulated fit is within the tolerance threshold.
Abstract:
Certain aspects of the present disclosure provide for a method of determining a virtual occlusion. The method may include obtaining a 3-D representation of a patient's first and second jaw portions. The method may further include, with the 3-D representation, representing in a GUI an initial position of the first jaw portion relative to the second jaw portion, the initial position being defined by six pre-determined degrees of freedom relative to a coordinate system fixed relative to the first jaw portion. The method may further include receiving user input of changes at least one degree of freedom, and automatically adjusting at least one other degree of freedom to minimize a vertical distance of the control point to the origin, thereby determining a virtual occlusion. The method may further include representing, in the GUI, the first and second jaw portions in the determined virtual occlusion.
Abstract:
This disclosure relates to a hybrid support system for supporting an object (504) formed by three dimensional printing. In some embodiments, a hybrid support system includes one or more volume support structures (506), a first volume support structure of the one or more volume support structures being coupled to a base plate and to a first portion of the object. The hybrid support system further includes a partially solidified support structure (508) coupled to a second portion of the object. The hybrid support system further includes one or more reinforcement support structures (510), a first reinforcement support structure of the one or more reinforcement support structures being coupled to the base plate and to at least one of a portion of the partially solidified support structure and a third portion of the object.