Patent application number | Description | Published |
20090220132 | METHOD FOR PROCESSING IMAGES OF INTERVENTIONAL RADIOLOGY - An image processing method for interventional imaging in which a region of interest of a patient is viewed. The method comprises acquiring a succession of images of a region of interest of the patient. The method also comprises detecting and tracking, on the successive images, at least one surgical instrument introduced inside the region of interest of the patient, in order to isolate said instrument therein; and comparing two successive images on which the surgical instrument has been isolated in order to identify at least one common shape therein. The method further comprises estimating the displacement of said common shape between both of these successive images; and re-alignment processing of the different successive images depending on the thereby determined estimations of displacements, these displacement estimations being considered as corresponding to the displacement caused by the physiological movement of the patient with the exception of any other movement. | 09-03-2009 |
20100030068 | METHOD FOR PROCESSING IMAGES AND ASSOCIATED MEDICAL IMAGING SYSTEM - A system and method of processing images of a region of interest of a patient is provided. The method comprises acquiring a reference image of the region of interest of the patient; during a pullback of an intravascular sensor in the region of interest, triggering simultaneously the steps of: acquiring a data collected by the sensor characteristic of the region of interest; and acquiring a succession of images of the region of interest associated with the location of the intravascular sensor when acquiring the data, respectively. The method further includes registering the succession of images; associating the location of the intravascular sensor relative to the step of acquiring the data collected by the intravascular sensor; and displaying and positioning the data collected by the intravascular sensor on the reference image in correspondence to the location of the intravascular sensor at the respective step of acquiring the data. | 02-04-2010 |
20110249790 | METHOD FOR PROCESSING RADIOLOGICAL IMAGES - A method for processing radiological images is provided. The method includes extracting at least two image portions from at least two radiological images of an area to be treated. The method also includes defining an area in a final image for each extracted image portion. The method further includes laying out the extracted image portions in the final image so that each area of the final image comprises an extracted image portion. | 10-13-2011 |
20110268340 | METHOD TO PROCESS RADIOLOGICAL IMAGES - A method to process radiological images is provided. The method comprises partitioning a radiological image of a region to be treated into a superimposition of layers, the region to be treated comprising at least one first structure and a second structure, wherein one layer solely comprises part of the first structure to be isolated from the remainder of the image, the layer solely comprising that part of the first structure to be isolated from the remainder of the image being determined by means of a parametric model of the first structure. The method further comprises determining an image of the region to be treated from the layering thus obtained, in which the isolated part of the first structure is omitted. | 11-03-2011 |
20120123238 | TREATMENT PROCESS OF RADIOLOGICAL IMAGES FOR DETECTION OF STENOSIS - A treatment process of radiological images is provided. The process comprises obtaining at least one set of images. For each set, the process comprises: segmenting an at least one first image to obtain an at least one first segmented image and to detect a plurality of arteries of the region of interest and an at least one second image to obtain an at least one second segmented image and to detect and isolate the tool; defining in the at least one first segmented image a plurality of lines, wherein each line defines an artery; determining, from the second segmented image and the defined lines, an artery of interest corresponding to the artery in which a tool has been inserted; and applying a quantitative analysis algorithm of coronary lesions to the artery of interest to detect lesion of the artery of interest. | 05-17-2012 |
20120150520 | SELECTION OF OPTIMAL VIEWING ANGLE TO OPTIMIZE ANATOMY VISIBILITY AND PATIENT SKIN DOSE - A method is provided for monitoring the radiation dose in a body to be imaged using an X-ray imaging device comprising an X-ray emitting source, a detector, a processing unit and a display. The method comprises exposing the body to be imaged to radiation doses to acquire initial 2D images; computing a 3D model of the body in relation to the initial 2D images using the processing unit; applying a model of the interactions between matter and radiation to the 3D model of the body using the processing unit; calculating, using the processing unit, a dose map of the distribution of the accumulated radiation dose in the 3D model for parameters that define the conditions of X-ray exposure; and displaying the 3D model of the body oriented according to the position of the emitting source with the dose map. | 06-14-2012 |
Patent application number | Description | Published |
20080267490 | SYSTEM AND METHOD TO IMPROVE VISIBILITY OF AN OBJECT IN AN IMAGED SUBJECT - A system to track movement of an object travelling through an imaged subject is provided. The system includes an imaging system to acquire a fluoroscopic image and operable to create a three-dimensional model of a region of interest of the imaged subject. A controller includes computer-readable program instructions representative of the steps of calculating a probability that an acquired image data is of the object on a per pixel basis in the fluoroscopic image, calculating a value of a blending coefficient per pixel of the fluoroscopic image dependent on the probability, adjusting the fluoroscopic image including multiplying the value of the blending coefficient with one of a greyscale value, a contrast value, and an intensity value for each pixel of the fluoroscopic image. The adjusted fluoroscopic image is combined with the three-dimensional model to create an output image illustrative of the object in spatial relation to the three-dimensional model. | 10-30-2008 |
20090022376 | METHOD FOR PROCESSING IMAGES IN INTERVENTIONAL RADIOSCOPY TO DETECT GUIDING INSTRUMENTATION EQUIPMENT - A method for processing images in interventional radioscopy for detecting guiding instrumentation equipment. The method of the invention enables objects of longilinear or very curved shapes to be detected within the radioscopic image having very low contrast to noise ratios. In one embodiment, an algorithm enables the measured contrast to noise ratio of long or curved structures in the image to be considerably improved. To do this, an embodiment of the invention uses oriented, separable, recursive and rapid steerable detection filters. Said detection filters have a low calculation cost, even for long filters having several orientations | 01-22-2009 |
20090136112 | Method for the processing of images in interventional radioscopy - A method for the processing of images in interventional radioscopy to produce a sequence of de-noised images in which elongated objects of guiding instrumentation equipment are preserved and enhanced. The method of the invention uses a tool for indicating the confidence to be placed in a given pixel as regards its belonging to a piece of guidance equipment. This tool is used to create a combination algorithm capable of re-injecting the pixels having a low contrast-to-noise ratio into the de-noised image. This combination algorithm enables the enhancement solely of the pixels of the guidance equipment with a high confidence value so as not to produce artifacts with the enhancement of false positives. | 05-28-2009 |
20110135183 | PROCESS FOR THREE-DIMENSIONAL RECONSTRUCTION OF AN OBJECT FROM A SINGLE VIEW - A method for determining an orientation in space of a substantially cylindrical shaped elementary object using a radiography device comprising a source of X-rays and a detector disposed opposite the source is provided. The radiography device is arranged to record a projection image of the elementary object when the elementary object is located between the source and the detector. The method includes: determining a quantity A of X-rays absorbed by the elementary object on the projection image; and evaluating the sine of an angle θ as a function of the quantity A of absorbed X-rays, wherein the angle θ is between a longitudinal axis of the elementary object and a plane of the projection image. | 06-09-2011 |
20120022845 | MONITORING OF THE RADIATION DOSE ACCUMULATED BY A BODY - The embodiments of the invention pertain to a method, a computer program, and an imaging system used to monitor the dose of radiation accumulated in a body or a part of a body being or having been subject to radiation exposure during an acquisition of at least one radiological image, comprising: processing the at least one radiological image to determine a 3D model of the body or of the part of a body; applying a theoretical model for the interactions between matter and radiation to the 3D model; storing in memory the parameters characteristic of the emission of radiation produced during the acquisition of the at least one radiological image; and calculating a distribution of an accumulated radiation dose in the body or the part of a body which has been the subject of the acquisition of the at least one radiological image. | 01-26-2012 |
20120300910 | X-RAY IMAGING APPARATUS HAVING A VARIABLE DISTANCE BETWEEN AN X-RAY SOURCE AND AN OBJECT TO BE IMAGED - An X-ray imaging apparatus comprising a rotary arm and an image assembly mounted on the rotary arm is provided. The image assembly comprises an X-ray detector and an X-ray source configured to emit X-rays incidental to the X-ray detector, wherein the X-ray source is coupled to the rotary arm by a movable support configured to modify the position of the X-ray source to set the distance between the X-ray source and an object to be imaged, and wherein movement of the X-ray source is dynamically controlled during tri-dimensional imaging. | 11-29-2012 |
20130018253 | METHOD FOR CONTROLLING EMMISSION IN AN X-RAY IMAGING DEVICEAANM Gorges; SebastienAACI VersaillesAACO FRAAGP Gorges; Sebastien Versailles FRAANM Desponds; LionelAACI St. Remy les ChevreuseAACO FRAAGP Desponds; Lionel St. Remy les Chevreuse FRAANM Bismuth; VincentAACI ParisAACO FRAAGP Bismuth; Vincent Paris FR - A method for controlling the emission of an X-ray imaging device configured to take images of a patient's body, into which a medical instrument has been inserted, is provided. The method comprises: processing at least one image of the patient's body taken by the X-ray imaging device to extract information representing the instrument, wherein the at least one image comprises the instrument; and adapting X-ray emission parameters of the X-ray imaging device, depending on the information extracted from the at least one image, to minimize the X-ray dose emitted towards the patient's body. | 01-17-2013 |
20130243162 | PATIENT SKIN DOSE MAPPING METHOD - A method for monitoring a radiation dose applied to a patient being exposed or having been exposed to radiation from a medical imaging system, the medical imaging system comprising an X-ray source, the X-ray source describing a trajectory in a coordinate system of reference of the medical imaging system having an origin, the method comprising determining the current coordinates, in the coordinate system of reference of the medical imaging system, of a current region being exposed or having been exposed to radiation from the X-ray source, of an envelope of a patient model, in relation to a current position of the X-ray source, determining, from the current coordinates, a current coordinate system of reference having as origin the current position of the X-ray source, the current coordinate system of reference being centered on the current region, and displaying a representation of the current region centered on the current coordinate system of reference. | 09-19-2013 |