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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 7. Отображено 7.
04-07-2013 дата публикации

METHOD FOR VISUALIZING THE QUALITY OF AN ABLATION PROCESS

Номер: US20130169624A1
Автор: BOURIER FELIX, Brost Alexander Benjamin, Kleinoeder Andreas, Kurzidim Klaus, Strobel Norbert
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A method for visualizing the quality of an ablation process with a processing and display unit is provided. A 3D dataset of an anatomical object and a 3D image model of an ablation instrument are provided, wherein the 3D image model models at least the surface of the ablation instrument. A position and an alignment of the 3D image model of the ablation instrument within the anatomical object is specified, wherein the 3D image model of the ablation instrument is incorporated into the 3D dataset of the anatomical object. At least a part of the incorporated 3D image model of the ablation instrument and of the 3D dataset of the anatomical object is presented and at least one characteristic quality value is determined as a function of the location of the 3D image model of the ablation instrument in relation to the anatomical object. 1. A method of visualizing the quality of an ablation method with a processing and display unit , the method comprising:S1) providing a 3D dataset of at least one anatomical object of an object to be examined;S2) providing at least one 3D image model of an ablation instrument, wherein the 3D image model models at least the surface of the ablation instrument;S3) specifying at least one position and an alignment of the 3D image model of the ablation instrument within the at least one anatomical object;S4) incorporating the 3D image model of the ablation instrument into the 3D dataset of the at least one anatomical object at the correct location;S5) displaying at least a part of the incorporated 3D image model of the ablation instrument and of the 3D dataset of the at least one anatomical object;S6) determining at least one characteristic quality value as a function of the location of the 3D image model of the ablation instrument in relation to the at least one anatomical object.2. The method as claimed in claim 1 , wherein the at least one quality value is visualized in the displaying of the at least one part of the incorporated 3D image model ...

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Номер записи: 1
04-07-2013 дата публикации

METHOD FOR PERFORMING DYNAMIC REGISTRATION, OVERLAYS, AND 3D VIEWS WITH FLUOROSCOPIC IMAGES

Номер: US20130172732A1
Автор: Brost Alexander Benjamin, Chen Terrence, Kiraly Atilla Peter, Strobel Norbert, Wu Wen
Принадлежит:

A method () and system () for performing real-time, dynamic overlays on fluoroscopic images to aid in navigation and localization during medical procedures. 1. A method of registration of image overlays for anatomical images , comprising:a. obtaining dynamic images of an anatomical region of interest;b. providing a static image of the anatomical region of interest;c. performing a rigid registration of the static image with the dynamic images using a lasso catheter secured to an object within the anatomical region of interest;d. estimating motion of the anatomical region of interest in the dynamic images using the lasso catheter; ande. dynamically updating registration of the images using the motion estimation.2. The method of claim 1 , wherein obtaining dynamic images comprises obtaining dynamic fluoroscopy images with corresponding projection geometry for each image of the anatomical region of interest.3. The method of claim 1 , wherein providing a static image comprises providing a segmented volumetric image of the anatomical region of interest.4. The method of claim 3 , wherein providing a static image further comprises marking points of interest of the anatomical region of interest.5. The method of claim 1 , wherein the anatomical region of interest comprises the heart and surrounding vasculature and the lasso catheter is secured to a pulmonary vein.6. The method of claim 1 , wherein the lasso catheter is secured to an object within the anatomical region of interest so as to move in synchronization with the anatomical region of interest and estimating comprises estimating motion of the lasso catheter.7. The method of claim 5 , wherein the lasso catheter is secured to a pulmonary vein so as to move in synchronization with the heart and estimating motion of the heart comprises estimating motion of the lasso catheter.8. The method of claim 6 , wherein estimating motion of the lasso catheter comprises tracking movement of the lasso catheter and approximately ...

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Номер записи: 2
24-10-2013 дата публикации

CATHETER NAVIGATION SYSTEM

Номер: US20130282005A1
Автор: Brost Alexander Benjamin, Kiraly Atilla Peter, KOCH Martin, Strobel Norbert
Принадлежит:

An integrated catheter navigation system () and method () that combines anatomical imaging () with catheter tip-to force information () during an ablation procedure. 1. An integrated system to support cardiac ablation procedures , comprising a) a catheter system having a catheter that is adapted to conduct ablation of heart tissue and a sensor that acquires measurements of contact force employed by the catheter in conducting ablations and b) an image guidance system that simultaneously provides a visualization of a cardiac ablation region and the acquired measurements and associated information of the contact force employed by the catheter in conducting a respective ablation of heart tissue.2. The system of claim 1 , wherein the sensor comprises a fiber optic force sensor.3. The system of claim 1 , wherein the visualization comprises an intra-procedural image of the cardiac ablation region and an overlay image.4. The system of claim 3 , wherein the overlay image comprises either a pre-procedural image of the cardiac ablation region or a model of a corresponding cardiac ablation region.5. The system of claim 1 , wherein the catheter system provides contact force measurements for each conducted ablation to the image guidance system and the image guidance system relates contact force measurements and associated information with a visualization location of a respective conducted ablation.6. The system of claim 5 , wherein the associated information comprises contact force vectors obtained from contact force measurements.7. The system of claim 5 , wherein the associated information comprises contact force-derived parameters obtained from contact force measurements.8. The system of claim 5 , wherein the image guidance system is adapted to manipulate the visualization of the cardiac ablation region claim 5 , contact force measurements and associated information claim 5 , and integration of the visualization and contact force measurements and associated information.9. The ...

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Номер записи: 3
12-12-2013 дата публикации

Combined Cardiac and Respiratory Motion Compensation for Atrial Fibrillation Ablation Procedures

Номер: US20130331687A1
Автор: Brost Alexander Benjamin, Chen Terrence, Hornegger Joachim, KOCH Martin Willibald, Liao Rui, Strobel Norbert, WIMMER Andreas, Wu Wen
Принадлежит: Siemens Corporation

A method for compensating cardiac and respiratory motion in atrial fibrillation ablation procedures includes (a) simultaneously determining a position of a circumferential mapping (CFM) catheter and a coronary sinus (CS) catheter in two consecutive image frames of a series of first 2-D image frames; (b) determining a distance between a virtual electrode on the CS catheter and a center of the CFM catheter for a first image frame of the two consecutive image frames, and for a second image frame of the two consecutive image frames; and (c) if an absolute difference of the distance for the first image frame and the distance for the second image frame is greater than a predetermined threshold, compensating for motion of the CFM catheter in a second 2-D image. 1. A computer implemented method for compensating cardiac and respiratory motion in atrial fibrillation ablation procedures , the method executed by a computer comprising the steps of:(a) simultaneously determining a position of a circumferential mapping (CFM) catheter and a coronary sinus (CS) catheter in two consecutive image frames of a series of first 2-D image frames;(b) determining a distance between a virtual electrode on the CS catheter and a center of the CFM catheter for a first image frame of the two consecutive image frames, and for a second image frame of the two consecutive image frames; and(c) if an absolute difference of the distance for the first image frame and the distance for the second image frame is greater than a predetermined threshold, compensating for motion of the CFM catheter in a second 2-D image.2. The method of claim 1 , further comprising repeating steps (a) claim 1 , (b) claim 1 , and (c) for each pair of consecutive image frames of the series of first 2-D image frames.3. The method of claim 1 , wherein determining a position of the circumferential mapping (CFM) catheter comprises:receiving a model of the CFM catheter determined from a set of points extracted from a first image frame ...

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Номер записи: 4
25-12-2014 дата публикации

METHOD AND SYSTEM FOR MOTION ESTIMATION MODEL FOR CARDIAC AND RESPIRATORY MOTION COMPENSATION

Номер: US20140378827A1
Автор: Brost Alexander Benjamin, Chen Terrence, Kaeppler Sebastian, Ostermeier Martin, Strobel Norbert, Wu Wen
Принадлежит:

A method and system for motion estimation modeling for cardiac and respiratory motion compensation is disclosed. Specifically, a coronary sinus catheter is tracked in a plurality of frames of a fluoroscopic image sequence; and cardiac and respiratory motion of a left atrium is estimated in each of the plurality of frames based on tracking results of the coronary sinus catheter using a trained motion estimation model. 1. A method comprising:tracking a first catheter in a plurality of frames of a fluoroscopic image sequence; andestimating cardiac and respiratory motion of a portion of a heart in each of the plurality of frames based on tracking results of the first catheter using a motion estimation model trained based on tracking results of the first catheter and a second catheter tracked in a sequence of training images.2. The method of claim 1 , further comprising:training the motion estimation model based on tracked electrodes of the first catheter and the tracked second catheter in a sequence of training images.3. The method of claim 2 , wherein training the motion estimation model comprises:detecting the electrodes of the first catheter and the second catheter in each training image sequence of training images;calculating features in the each training image based on locations of the electrodes of the first catheter;determining a cardiac cycle value for each training image based on the calculated features; anddetermining a correspondence between the cardiac cycle values and positions of the second catheter in the training images.4. The method of claim 2 , wherein the sequence of training images is of same patient as the fluoroscopic image sequence.5. The method of claim 2 , wherein the sequence of training images is a number of frames of the fluoroscopic image sequence prior to the plurality of frames of the fluoroscopic image sequence.8. The method of claim 1 , wherein the step of estimating cardiac and respiratory motion comprises claim 1 , for each of the ...

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Номер записи: 5
18-06-2015 дата публикации

Method and device for visualizing the quality of an ablation procedure

Номер: DE102011083522B4
Автор: Alexander Benjamin Brost, Andreas Kleinöder, Felix Bourier, Klaus Kurzidim, Norbert Strobel
Принадлежит: Friedrich Alexander Univeritaet Erlangen Nuernberg FAU, SIEMENS AG

Verfahren zur Visualisierung der Qualität eines Ablationsvorgangs mit Hilfe eines Rechen- und Anzeigemittels (101), wobei das Verfahren folgende Verfahrensschritte umfasst: S1) Bereitstellen eines 3D-Datensatzes eines anatomischen Objektes (10) eines Untersuchungsobjektes (106); S2) Bereitstellen eines 3D-Bildmodells eines Ablationsinstrumentes (1), wobei das 3D-Bildmodell wenigstens die Oberfläche des Ablationsinstrumentes (1) modelliert; S3) Vorgabe einer Position und einer Ausrichtung des 3D-Bildmodells des Ablationsinstrumentes (1) innerhalb des anatomischen Objektes (10); S4) Lagerichtiges Einblenden des 3D-Bildmodells des Ablationsinstrumentes (1) in den 3D-Datensatz des anatomischen Objektes (10); S5) Darstellung zumindest eines Teils des eingeblendeten 3D-Bildmodells des Ablationsinstrumentes (1) und des 3D-Datensatzes des anatomischen Objektes (10); S6) Bestimmung wenigstens eines Qualitätskennwertes in Abhängigkeit der Lage des 3D-Bildmodells des Ablationsinstrumentes (1) zu dem anatomischen Objekt (10). A method of visualizing the quality of an ablation procedure with the aid of a calculation and display means (101), the method comprising the following method steps: S1) providing a 3D data record of an anatomical object (10) of an examination subject (106); S2) providing a 3D image model of an ablation instrument (1), wherein the 3D image model models at least the surface of the ablation instrument (1); S3) specifying a position and an orientation of the 3D image model of the ablation instrument (1) within the anatomical object (10); S4) Blind insertion of the 3D image model of the ablation instrument (1) into the 3D data record of the anatomical object (10); S5) representation of at least part of the displayed 3D image model of the ablation instrument (1) and of the 3D data record of the anatomical object (10); S6) determining at least one quality characteristic as a function of the position of the 3D image model of the ablation instrument (1) relative ...

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Номер записи: 6
27-08-2019 дата публикации

Method and system for motion estimation model for cardiac and respiratory motion compensation

Номер: US10390754B2
Автор: Alexander Benjamin Brost, Martin Ostermeier, Norbert Strobel, Sebastian Kaeppler, Terrence Chen, Wen Wu
Принадлежит: Friedrich Alexander Univeritaet Erlangen Nuernberg FAU, Siemens Healthcare GmbH

A method and system for motion estimation modeling for cardiac and respiratory motion compensation is disclosed. Specifically, a coronary sinus catheter is tracked in a plurality of frames of a fluoroscopic image sequence; and cardiac and respiratory motion of a left atrium is estimated in each of the plurality of frames based on tracking results of the coronary sinus catheter using a trained motion estimation model.

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Номер записи: 7