Detecting the Media-adventitia Border in Intravascular Ultrasound Images through a Classification-based Approach.

Detecting the Media-adventitia Border in Intravascular Ultrasound Images through a Classification-based Approach. Ultrason Imaging. 2018 Dec 16;:161734618820112 Authors: Wang YY, Qiu CH, Jiang J, Xia SR Abstract The detection of the media-adventitia (MA) border in intravascular ultrasound (IVUS) images is essential for vessel assessment and disease diagnosis. However, it remains a challenging task, considering the existence of plaque, calcification, and various artifacts. In this article, an effective method based on classification is proposed to extract the MA border in IVUS images. First, a novel morphologic feature describing the relative position of each structure relative to the MA border, called RPES for short, is proposed. Then, the RPES feature and other features are employed in a multiclass extreme learning machine (ELM) to classify IVUS images into nine classes including the MA border and other structures. At last, a modified snake model is employed to effectively detect the MA border in the rectangular domain, in which a modified external force field is constructed on the basis of local border appearances and classification results. The proposed method is evaluated on a public dataset with 77 IVUS images by three indicators in eight situations, such as calcification and a guide wire artifact. With the proposed RPES feature, detection performances are improved by more than 39 percent, which shows an apparent advantage in co...
Source: Ultrasonic Imaging - Category: Radiology Tags: Ultrason Imaging Source Type: research