摘要:
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
摘要:
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.
摘要:
An imaging system of an object in an imaged subject is provided. The imaging system includes an image detector and a guidewire in support of a pair of markers. The imaging system also includes a controller in communication with the image detector. The controller includes a processor in communication to execute a series of programmable instructions stored in a memory, the programmable instructions including acquiring a plurality of acquired images, detecting a position of the pair of markers, calculating a first mathematical representation of an alignment of the guidewire between the markers and a second mathematical representation of an alignment of the guidewire not between the markers, and registering the first and second mathematical representations of the guidewire extending through the object relative to more than one of the acquired images so as to locate the object in at least one of the acquired images.
摘要:
An imaging system of an object in an imaged subject is provided. The imaging system includes an image detector and a guidewire in support of a pair of markers. The imaging system also includes a controller in communication with the image detector. The controller includes a processor in communication to execute a series of programmable instructions stored in a memory, the programmable instructions including acquiring a plurality of acquired images, detecting a position of the pair of markers, calculating a first mathematical representation of an alignment of the guidewire between the markers and a second mathematical representation of an alignment of the guidewire not between the markers, and registering the first and second mathematical representations of the guidewire extending through the object relative to more than one of the acquired images so as to locate the object in at least one of the acquired images.
摘要:
A process and system for improving a digital image of an object defined by pixels, acquired at the instant t and generated from an X-ray detector receiving X-rays emitted by a source. The process includes: determining a predicted image of the object at the instant t as a function of the images of the object acquired at the instants t-i, i being a positive whole number greater than or equal to 1, and moving of each of the layers constituting the image acquired at the instant t, the number of layers being previously fixed and the moving of each of the layers being previously determined; and generating a visualized image corresponding to a weighted sum of the predicted image and the image of the object acquired at the instant t, so as to attenuate the noise of the image of the object acquired at the instant t.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.