Koninklijke Philips Corporation N.v.

Dieter Geller

Gereon Vogtmeier

Klaus Juergen Engel

Thomas Koehler

Yuechen Qian

Reinhard Kneser

Ewald Roessl

Juergen Weese

Jochen Peters

Gerhard Martens

Merlijn Sevenster

Lyubomir Georgiev Zagorchev

Gerd Lanfermann

Helko Lehmann

Richard Daniel Willmann

Robbert Christiaan Van Ommering

Sebastian Siegmund Schusser

Paola Karina Tulipano

Elizabeth Anne Morre

Matthew A Garlinghouse

Robert M Roth

Thomas W McAllister

The invention relates to a system () for visualizing an object of interest comprised in a volume of an image dataset, the system comprising a path unit () for specifying a path in the volume of the image dataset on the basis of the object of interest, a location unit () for determining a location on a projection ray through the volume of the image dataset on the basis of the specified path, and a value unit () for computing a projected gray value corresponding to the projection rayon the basis of the determined location on the projection ray. Because the locations on the projection ray are determined based on the specified path for indicating the object of interest, the actual computation of the projection gray values may be designed and constructed to show gray values describing the object of interest while hiding gray values describing other objects, in particular occluding objects. Thus, the system of the invention is arranged for visualizing the object of interest at different viewing angles without occluding the object of interest.

Path proximity rendering

The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ratio, an X-ray device () for imaging an object () is provided. The X-ray device () comprises an X-ray emitter arrangement () and an X-ray detector arrangement (), wherein the X-ray emitter arrangement () is adapted to emit an X-ray beam () through the object () onto the X-ray detector arrangement (). The X-ray beam () is at least partial spatial coherent and fan-shaped. The X-ray detector arrangement () comprises a phase grating () and an absorber grating (). The X-ray detector arrangement () comprises an area detector () for detecting X-rays, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object (). The object () has a region of interest () which is larger than a detection area of the X-ray detector () and the X-ray device () is adapted to generate image data of the region of interest () by moving the object () and the X-ray detector arrangement () relative to each other.

Scanning system for differential phase contrast imaging

The invention describes a computer-based system that asks () a patient to pronounce a word displayed on a monitor, automatically assesses () the speech quality, and uses suitable means to feed back () any improvement or deterioration of speech quality.

System and method of training a dysarthric speaker

As medical imaging becomes more affordable, and the diversity of diagnostic modalities and therapeutic treatments increase, the amount of data being stored increases, and the problem becomes even more critical. One approach to improve retrieval efficiency of images is to employ semantics to establish a defined set of search and classification terms. However, such semantic systems still require the user to make a selection of the most appropriate term or terms to classify a report or image, and the accuracy of the results are thus dependent on the skill and knowledge of the classifier. According to a first aspect of the invention, a retriever is provided for retrieving a medical image having a searchable attribute, the retriever being configured to interface with a semantic database and an image database, and wherein the searchable attribute is determined by segmenting the medical image, using the anatomical model.

Retrieving and viewing medical images

A system and method for automatic segmentation, performed by selecting a deformable model of an anatomical structure of interest imaged in a volumetric image, the deformable model formed of a plurality of polygons including vertices and edges, displaying the deformable model on a display, detecting a feature point of the anatomical structure of interest corresponding to each of the plurality of polygons and adapting the deformable model by moving each of the vertices toward the corresponding feature points until the deformable model morphs to a boundary of the anatomical structure of interest, forming a segmentation of the anatomical structure of interest.

System for rapid and accurate quantitative assessment of traumatic brain injury

X-ray devices for Phase Contrast Imaging (PCI) are often built up with the help of gratings. For large field-of-views (FOV), production cost and complexity of these gratings could increase significantly as they need to have a focused geometry. Instead of a pure PCI with a large FOV, this invention suggests to combine a traditional absorption X-ray-imaging system with large-FOV with an insertable low-cost PCI system with small-FOV, The invention supports the user to direct the PCI system with reduced FOV to a region that he regards as most interesting for performing a PCI scan thus eliminating X-ray dose exposure for scanning regions not interesting for a radiologist. The PCI scan may be generated on the basis of local tomography.

Phase contrast imaging

An X-ray image acquisition apparatus employing phase-contrast imaging with enlarged field of view includes an X-ray source, an X-ray detector element having a detector size, a beam splitter grating and an analyzer grating. An object is arrangeable between the X-ray source and detector. The beam splitter grating and the analyzer grating are arrangeable between the X-ray source and detector. The X-ray source, the beam splitter grating, the analyzer grating and the X-ray detector are operatively coupled such that a phase-contrast image of the object is obtainable. The apparatus is configure to acquire a phase-contrast image having a field of view larger than the detector size. The X-ray detector element is displaceable where, by the displacement of the X-ray detector, a phase-contrast image of the enlarged field of view is obtainable.

Apparatus for phase-contrast imaging comprising a displaceable X-ray detector element and method

The invention relates to a system () for classifying image data on the basis of a model for adapting to an object in the image data, the system comprising a segmentation unit () for segmenting the image data by adapting the model to the object in the image data and a classification unit () for assigning a class to the image data on the basis of the model adapted to the object in the image data, thereby classifying the image data, wherein the classification unit () comprises an attribute unit () for computing a value of an attribute of the model on the basis of the model adapted to the object in the image data, and wherein the assigned class is based on the computed value of the attribute. Thus, the system () of the invention is capable of classifying the image data without any user input. All inputs required for classifying the image dataconstitute a model for adapting to an object in the image data. A person skilled in the art will understand however that in some embodiments of the system (), a limited number of user inputs may be enabled to let the user influence and control the system and the classification process.

Image classification based on image segmentation

The present invention generally refers to a correction method for grating-based X-ray differential phase contrast imaging (DPCI) as well as to an apparatus which can advantageously be applied in X-ray radiography and tomography for hard X-ray DPCI of a sample object or an anatomical region of interest to be scanned. More precisely, the proposed invention provides a suitable approach that helps to enhance the image quality of an acquired X-ray image which is affected by phase wrapping, e.g. in the resulting Moir&#xe9; interference pattern of an emitted X-ray beam in the detector plane of a Talbot-Lau type interferometer after diffracting said X-ray beam at a phase-shifting beam splitter grating. This problem, which is further aggravated by noise in the obtained DPCI images, occurs if the phase between two adjacent pixels in the detected X-ray image varies by more than &#x3c0; radians and is effected by a line integration over the object's local phase gradient, which induces a phase offset error of &#x3c0; radians that leads to prominent line artifacts parallel to the direction of said line integration.

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Aachen, Germany

Dieter Geller