Abstract: A 3D image of a region of an object is computed from truncated cone beam projection data acquired with an x-ray device and a prior CT image representing a larger region of the object. The truncated projection data are extrapolated to derive pseudoprojection data associated with projection directions outside the detector, and an intermediate CT image is reconstructed based on the truncated projection data completed with the pseudoprojection data. The prior CT image is then registered with the intermediate CT image. Forward projection data associated with projection directions outside the detector are computed from the truncated projection data and the registered prior CT image. The 3D image is finally reconstructed based on the truncated projection data completed with the forward projection data.

Abstract: Image registration very often used to be a tedious task which had Si to be performed manually. According to an exemplary embodiment of the present invention, a non-rigid image registration by an iterative refinement process based on a combination of landmarks with similarity values is proposed. Advantageously, a very fast and robust method maybe provided.

Abstract: The present invention relates to a method and a corresponding apparatus for visualization of a tubular structure of an object by use of a 3D image data set of said object. In order to provide a more efficient and illustrative visualization a method is proposed comprising the steps of: —generating and visualising a curved planar reformation view (C) from a symbolic pathway view (B) of said tubular structure, said symbolic pathway view (B) representing said tubular structure and the pathway points of said symbolic pathway being assigned with their 3D spatial position data, and —generating and visualising at least one planar view (O) of said object (1) through a viewing point (V) of said tubular structure selected in said curved planar reformation view (C) or said symbolic pathway view (B).

Abstract: The invention relates to a method for the registration of a series of at least three temporally successively acquired images (I1–In) of an object. Individual images (I2–In) to be registered are transformed into registered images (I2?-In?) using an individual mapping rule (T2–Tn). A similarity measure (M) is used to determine a mapping rule (T2–Tn), where to achieve a higher registration accuracy, a common similarity measure (M) of all images (I1?-In?) in order to determine the mapping rules (T2–Tn) for all images is implemented. The invention also relates to a corresponding registration device.

Abstract: The invention relates to a method of tomographic imaging, and in particular a CT or MR method, for the repetitive production of diagnostic slice images of a part of a patient's body. To allow a geometrical transformation (2) to be determined, current reference slice images (1) of the part of the body, which are brought into agreement with earlier reference slice images (3) of the part of the body are first made in this case. Current imaging parameters (5) are then calculated for a current diagnostic slice image (6) by transforming earlier imaging parameters by the geometrical transformation (2) previously determined.

Abstract: It may be desirable to obtain three-dimensional information on a sample 2 to be studied in an electron microscope. Such information can be derived from a tilt series 2-i of the sample and a subsequent reconstruction of the three-dimensional structure by means of a computer algorithm. For a proper reconstruction of the structure in the volume of the sample it is important that the measurement geometry be known; therefore it is important that the images be properly aligned. Therefore markers 8-i (e.g. gold particles) are applied to the sample, which markers yield straight lines 10-i as the sample is rotated and projections of that rotated sample are made onto one image plane. According to the invention the straight lines are recognised, which gives the possibility to identify the individual markers in the images of the tilt series, and to align those images on the basis of the information thus obtained.

Abstract: A device for monitoring a processing liquid comprising at least one sensor for generating at least one monitoring signal, and a device for processing the monitoring signal and for generating a control signal for directly or indirectly influencing the composition or condition of the processing liquid. A device is also provided for detecting, storing, and maintaining the reliability of performance of the sensor. In addition, actuators are provided for converting given criteria or specified values.

Abstract: The invention relates to a method for the registration of a series of at least three temporally successively acquired images I1-In) of an object, where individual images (I2-In) to be registered are transformed into registered images (I2′-In′) by means of an individual mapping rule (T2-Tn) and where a similarity measure (M) is used so as to determine the mapping rule (T2-Tn). In order to achieve a higher registration accuracy, in accordance with the invention it is proposed to utilize a common similarity measure (M) of all images (I1′-In′) in order to determine the mapping rules (T2-Tn) for all images. The invention also relates to a corresponding registration device.