摘要:
The invention relates to a method for performing an optical three-dimensional recording (4) by using a hand-held dental camera (2), wherein the camera (2) automatically records a plurality of individual optical recordings (4) in succession at a defined frequency during the measurement, wherein the individual three-dimensional optical recordings (4) are combined by means of registration into an overall recording of a dental object (1) to be measured. Before the measurement is performed, a three-dimensional standard jaw model (7) is displayed by means of a display device (6), wherein a first control point (10) on the standard jaw model (7) is displayed by means of the display device (6). The hand-held dental camera (2) is then positioned in relation to the object (1) to be recorded in such a way that the camera (2) points at the first control point (10) of the standard jaw model (7) and records a corresponding recording region of the dental object (1).
摘要:
A method, apparatus, and computer readable medium for removing an unwanted object from an image volume are provided. Volumetric data of an object of study is generated in a radiographic scan. Volumetric data of the unwanted object is obtained. The two sets of volumetric data are registered in a common coordinate system. The unwanted object is removed from the volumetric data of the object of study to create modified volumetric data of the object of study. Data from voxels surrounding the removed unwanted object may be used to populate voxels corresponding to the unwanted object with interpolated data. A plurality of forward projections are performed on the modified volumetric data of the object of study, and a tomogram with the unwanted object removed is constructed.
摘要:
Hardware and software configurations, optionally, for performing profilometry of an object are disclosed. An advantageous imaging device is described. An advantageous approach to determining imager position is also described. Each aspect described may be used independently of the other. Moreover, the teaching may find use in other fields including velocimetry, etc.
摘要:
In a scanning device for magnetic resonance imaging for medical diagnostics, more particularly for dental-medical diagnostics or ENT diagnostics, comprising a main magnet (200 - 210) for generating a static main magnetic field (220) having a homogeneous region (225), and comprising at least one transmitting and/or receiving coil for emitting and/or receiving a radio-frequency magnetic field, provision is made, in particular, for the main magnet (200 - 210) to be formed by two poles (205, 210) of magnetically opposite polarities at the end side, wherein the static main magnetic field (220) generated by the two poles (205, 210) at the end sides thereof, including the homogeneous region (225), projects beyond the end sides of the poles (205, 210).
摘要:
Provided herein are compositions for applying a reference marker pattern or grid to the surface of an object to be imaged three-dimensionally. These compositions can be quick drying for ease of use. Methods of use of the compositions are also provided as well as devices and kits for the application of the compositions.
摘要:
The invention relates to a method for planning or for checking the planning of a dental and/or a maxillofacial treatment, wherein at least one video recording of an object (3) is recorded by means of at least one video camera (1). A patient model (4) is available, which comprises image data of the object (3), wherein the video recording is virtually coupled to the patient model (4) in such a way that a viewing direction (13) of the view of the patient model (4) is changed in dependence on a changing recording direction (9, 46, 47, 48, 49, 50) of the video recording when the video camera (1) is moved in relation to the object (3).
摘要:
The invention relates to a method and a calibration device for calibrating a dental camera (1), which is based on a fringe projection method for optically measuring a dental object (10) in three dimensions, comprising a projection grid (2) for generating a projection pattern (3) that consists of a plurality of fringes (5), and an optical system (4) that projects the generated projection pattern (3) onto the object (10) to be measured. In a first step, a reference surface (74) with known dimensions is measured by the dental camera (1) using the fringe projection method. Actual coordinates (33, 36) of a plurality of measurement points (11) are determined on the reference surface (74), and the determined actual coordinates (33, 36) are compared to target coordinates (34) of the measurement points (11) on the reference surface (74). In the following method step, proceeding from the deviations (35, 37) between the actual coordinates (33, 36) and the target coordinates (34), a plurality of compensation values (40, 50, 51, 52, 53) are calculated for the individual fringes (5) of the projection pattern (3).