Characterization of Coronary Plaque by Using 2D Frequency Histogram of RF Signal
Tissue characterization of plaque in coronary arteries by using histogram-based frequency spectrum in window is proposed. Radio frequency (RF) signals, observed by the intravascular ultrasound catheter rotating in the coronary artery, are used for the tissue characterization. The conventional methods only use the frequency spectrum at the point of tissue of concern. However, in the proposed method the 2D histogram, concerning frequency and spectral band intensity, created from the window matrix of RF signals, is employed. The accuracy of the tissue characterization has been improved compared with the conventional methods which only use the statistical information of the frequency spectrum.
Keywordsintravascular ultrasound radio frequency signal 2D histogram k-nearest neighbor
Many thanks are due to Dr. T. Hiro for providing the IVUS data. Thanks are also due to Dr. G. Vachkov for his helpful discussions. This work was supported by the Grant-in-Aid for Scientific Research (B) of the Japan Society of Promotion of Science (JSPS) under the contract No.23300086.
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