|
|
|
| Separation and Revision of Non-Functional Movements from the Omnidirectional M-Mode Echocardiography#br# |
| College of Physics and Information Engineering, Fuzhou University, Fujian 350002, China |
|
|
|
Abstract Due to the interference of blood pulse and muscle stretching, the heart movements detected by B type ultrasonic contain functional and non-functional motions. therefore, the motional curve of heart obtained by this way cannot exactly reveal heart’s function. In this article, the contour of left ventricle in a short axis was firstly extracted using the modified Canny algorithm and the gray searching algorithm in radial direction as auxiliary. Non-functional movements were obtained using the movement extracting method based on Fourier descriptors, as well as the method of mass center and inertia axis, and finally removed from the compound motion. As a result, the cardiac motional curve obtained using this method eliminated the phenomena of multi line, shift excursion and being smooth. It showed that the modified sampling directional lines accurately tracked the movements on a certain position in heart at any moment, and the cardiac motional curve did not shift with the movement of non-functional, and the characteristics point was remained. Compared with the original method, the proposed motional curve of heart movement accurately reflected the functional movement at a certain place in the heart.
|
|
|
|
|
|
|
|
|
