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Methods for cardiac tracing and abnormality detection in 2D and 3D digital chest radiographs

IP.com Disclosure Number: IPCOM000193232D
Publication Date: 2010-Feb-15
Document File: 4 page(s) / 35K

Publishing Venue

The IP.com Prior Art Database

Abstract

One embodiment of the invention describes planar-based geometrical approach that iteratively detects and traces the cardiac boundary, size and subsequently cardio thoracic ratio in 2D & 3D digital chest radiographs. Iterative mechanism may be employed for designing multiple sub planar regions of interest.

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This is the abbreviated version, containing approximately 45% of the total text.

METHODS FOR CARDIAC TRACING AND ABNORMALITY DETECTION IN 2D AND 3D DIGITAL CHEST RADIOGRAPHS

FIELD OF INVENTION

The invention generally relates to ultrasonic diagnostic imaging systems and more particularly to ultrasonic diagnostic imaging systems, which automatically define the borders and boundaries of anatomical structures within an ultrasonic image.

BACKGROUND OF THE INVENTION

Detecting and making fundamental observations about heart from chest X-ray is important for the detection of cardiac disease in patients having cardiac abnormalities. It is a challenging task to detect and trace cardiac boundaries and hence its size. Given 2D or 3D digital chest X-ray radiographs it is indeed a challenging task to automatically trace cardiac contours and subsequently assess the abnormalities.

Hence there exists a need for a simple and reliable method to automatically trace cardiac contours and thereby detect and assess the cardiac abnormalities.

BRIEF DESCRIPTION OF THE INVENTION

One embodiment of the invention describes planar-based geometrical approach that iteratively detects and traces the cardiac boundary, size and subsequently cardio thoracic ratio in 2D & 3D digital chest radiographs. Iterative mechanism may be employed for designing multiple sub planar regions of interest.


The planar region of interest can be designed from clavicle medial end and intersection of diaphragm and thoracic cage. A center of mass pattern is designed based on overlapping multiple disjoint sub planar region of interests. Subsequently the contributions of center of mass pattern of all sub planar region of interests are ensembled for tracing cardiac boundary points.


Further, a patient population based sub planar region of interest mask is designed for constraining the length of cardiac boundary. A geometrical approach is used for detecting cardiac boundary peak and size of thoracic cage.

DETAILED DESCRIPTION OF THE INVENTION

A method for cardiac tracing and abnormality detection in 2D and 3D digital chest radiograph is provided. The method comprises steps of detecting inward medial clavicle end for each lung field, detecting point of intersection between top of diaphragm and inner thoracic cage and adapting planar based approach for tracking cardiac contour.

The planar based approach for tracking cardiac contour comprises designing variable size multiple disjoint planar region of interests and designing center of mass pattern for multiple disjoint planar region of interests, employing concept of multiple overlapped sub planar regions of interest in evaluating center of mass and ensembling contributions of overlapped sub planar regions of interest for detecting a cardiac boundary point.

The method further comprises designing patient population based sub planar region of interest mask for constraining the length of cardiac boundary, employing tangent based mechanism for detecting cardiac boundary peak and employing tangent based mechanism for detecting size of thoracic...