Method for automatic construction of 2d statistical shape model for the lung regions

a statistical shape model and automatic construction technology, applied in the field of lung shape modeling, can solve the problems of reducing and avoiding the introduction of user bias by manual labeling, so as to reduce the time and effort required to label sets of data. , the effect of avoiding the introduction of user bias

Inactive Publication Date: 2007-03-15
CARESTREAM HEALTH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] The invention has the following advantages.
[0009] 1. The entire alignment and labeling process is automatic.
[0010] 2. Th...

Problems solved by technology

Manual definition of landmarks on 2D shapes has proven to be both time-consuming and error prone.
Though this can considerably reduce the time and effort required, labeling large sets of examples is still labor intensive.
However, as pointed out by several studies, curvature is a rigid invariant of shape and its applicability is limited in case of nonlinear shape distortions.
In addition, it is hard to find su...

Method used

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  • Method for automatic construction of 2d statistical shape model for the lung regions
  • Method for automatic construction of 2d statistical shape model for the lung regions
  • Method for automatic construction of 2d statistical shape model for the lung regions

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Embodiment Construction

[0031] The present invention relates in general to the processing of chest radiographic images. FIG. 12 is a block diagram of a radiographic system incorporating the present invention. As shown a radiographic image, such as a chest radiographic image is acquired by an image acquisition system 1600. Image acquisition system 1600 can include one of the following. (1) A conventional radiographic film / screen system in which a body part (chest) of a patient is exposed to x-radiation from an x-ray source and a radiographic image is formed in the radiographic image is formed in the radiographic film. The film is developed and digitized to produce a digital radiographic image. (2) A computed radiography system in which the radiographic image of the patient's body part is formed in a storage phosphor plate. The storage phosphor plate is scanned to produce a digital radiographic image. The storage phosphor plate is erased and reused. (3) A direct digital radiography system in which the radiog...

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Abstract

A method for automatic construction of 2D statistical shape models for the lung regions in chest radiographic images. The method includes: extracting the anatomical structure contours from a chest radiograph image; generating a polygonal shape approximation for each contour; aligning a plurality of polygonal shape approximations by minimizing their distance; assigning a plurality of landmarks on each shape contour; and determining a statistical shape model using aligned shape contours.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation of U.S. Ser. No. 10 / 315,855 entitled “METHOD FOR AUTOMATIC CONSTRUCTION OF 2D STATISTICAL SHAPE MODEL FOR THE LUNG REGIONS”, and filed on Dec. 10, 2002 in the names of Luo et al., and which is assigned to the assignee of this application.FIELD OF THE INVENTION [0002] This invention relates in general to lung shape modeling, and in particular to a method for automatically constructing two-dimension (2D) statistical shape model of the lung regions from sets of chest radiographic images. BACKGROUND OF THE INVENTION [0003] The use of shape as an anatomical object property is a rapidly increasing portion of research in the field of medical image analysis. Shape representations and shape models have been used in connection with segmentation of medical images, diagnosis, and motion analysis. Among different types of shape models, Active Shape Models (ASMs) have been frequently applied and proven a powerful tool for chara...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06T5/00
CPCG06T7/0081G06T7/0089G06T2207/10116G06T2207/30061G06T2207/20104G06T2207/20124G06T2207/30012G06T2207/20081G06T7/11G06T7/149
Inventor LUO, HUIFOOS, DAVID H.
Owner CARESTREAM HEALTH INC
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