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Application of image processing techniques to γ-angiography

✍ Scribed by Dominique Romary; Jean-François Lerallut; Guy Fontenier

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
614 KB
Volume
18
Category
Article
ISSN
0010-4809

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✦ Synopsis

Different image processing techniques have been tested and compared on data derived from y-angiography images to detect the boundary of the left ventricle. The method involves a preprocessing step, followed by the edge detection itself. The best preprocessing is a nonlinear "variant" filtering, where each pixel is replaced by the average of the 3 x 3 neighborhood having the smallest variance. The edge detector giving the best contour is a Sobel operator. A second-order high-pass Butterworth filter also provides a good segmentation.

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