Patent application number | Description | Published |
20080267475 | Method for high-resolution presentation of filigree vessel implants in angiographic images - The invention relates to a method for high-resolution display of vessel implants in angiographic images, featuring the steps: recording at least two images of an object-catheter combination including catheter markers with a medical imaging method; detection of an region of interest created in the form of an area between the balloon markers which completely contains the object to be registered for each recorded image; coarse registration of the region of interest images by registration of the respective pairs of balloon markers of all recorded images; fine registration of the region of interest image content/of the region of interest image by registration of the region of interest content; and arithmetic averaging across the fine-registered images. | 10-30-2008 |
20090116713 | Method and system for human vision model guided medical image quality assessment - A method and system for image quality assessment is disclosed. The image quality assessment method is a no-reference method for objectively assessing the quality of medical images. This method is guided by the human vision model in order to accurately reflect human perception. A region of interest (ROI) of medical image is divided into non-overlapping blocks of equal size. Each of the blocks is categorized as a smooth block, a texture block, or an edge block. A perceptual sharpness measure, which is weighted by local contrast, is calculated for each of the edge blocks. A perceptual noise level measure, which is weighted by background luminance, is calculated for each of the smooth blocks. A sharpness quality index is determined based on the perceptual sharpness measures of all of the edge blocks, and a noise level quality index is determined based on the perceptual noise level measures of all of the smooth blocks. An overall image quality index can be determined by using task specific machine learning of samples of annotated images. The image quality assessment method can be used in applications, such as video/image compression and storage in healthcare and homeland security, and band-width limited wireless communication. | 05-07-2009 |
20100322499 | System for Detecting Catheterization Devices - A medical image data processing system automatically identifies a catheterization device including marker objects for use in identifying the catheterization device in a medical image for Angiography or another medical procedure. The system includes an image data processor that automatically identifies non-marker objects in a medical image by comparing image data representing individual non-marker objects with image data representing a template non-marker object. The processor automatically identifies catheterization device marker objects by comparing image data representing individual candidate marker objects with image data representing a template marker object and by processing image representative data to provide processed image data excluding image data representing non-marker objects. A user interface generates data representing a display image indicating identified marker objects and an associated catheterization device using the processed image data for presentation to a user. | 12-23-2010 |
20110135176 | System for Processing Medical Images Showing an Invasive Instrument - A medical image data processing system automatically selects images showing an anatomically invasive instrument having a pair of instrument identification marker objects. An image data processor automatically, identifies one or more candidate image objects potentially representing invasive instrument marker objects in multiple images in a sequence of acquired images in response to predetermined size and shape data of marker objects. The image data processor identifies pairs of the identified candidate image objects potentially indicating an invasive instrument, in response to predetermined data associated with relative location of individual marker objects of a pair of identification marker objects of an invasive instrument. The image data processor selects in the multiple images, at least one of the identified pairs of identified candidate image objects in response to predetermined criteria and selects images of the multiple images associated with a selected pair of identified candidate image objects. | 06-09-2011 |