Method, apparatus, and storage medium for detection of nodules i

Details Method, apparatus, and storage medium for detection of nodules i Method, apparatus, and storage medium for detection of nodules i

1997-07-25

2000-06-20

Au, Amelia

Image analysis

Applications

Biomedical applications

382199, 382224, 382266, G06K 900

Patent

active

060786809

ABSTRACT:
A method and apparatus for discrimination of nodules and false positives in digital chest radiographs, using a wavelet snake technique. The wavelet snake is a deformable contour designed to identify the boundary of a relatively round object. The shape of the snake is determined by a set of wavelet coefficients in a certain range of scales. Portions of the boundary of a nodule are first extracted using a multiscale edge representation. The multiscale edges are then fitted by a gradient descent procedure which deforms the shape of a wavelet snake by changing its wavelet coefficients. The degree of overlap between the fitted snake and the multiscale edges is calculated and used as a fit quality indicator for discrimination of nodules and false detections.

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