Small-window parametric imaging based on information entropy for ultrasound tissue characterization

Po Hsiang Tsui, Chin Kuo Chen, Wen Hung Kuo, King Jen Chang, Jui Fang, Hsiang Yang Ma, Dean Chou

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Constructing ultrasound statistical parametric images by using a sliding window is a widely adopted strategy for characterizing tissues. Deficiency in spatial resolution, the appearance of boundary artifacts, and the prerequisite data distribution limit the practicability of statistical parametric imaging. In this study, small-window entropy parametric imaging was proposed to overcome the above problems. Simulations and measurements of phantoms were executed to acquire backscattered radiofrequency (RF) signals, which were processed to explore the feasibility of small-window entropy imaging in detecting scatterer properties. To validate the ability of entropy imaging in tissue characterization, measurements of benign and malignant breast tumors were conducted (n = 63) to compare performances of conventional statistical parametric (based on Nakagami distribution) and entropy imaging by the receiver operating characteristic (ROC) curve analysis. The simulation and phantom results revealed that entropy images constructed using a small sliding window (side length = 1 pulse length) adequately describe changes in scatterer properties. The area under the ROC for using small-window entropy imaging to classify tumors was 0.89, which was higher than 0.79 obtained using statistical parametric imaging. In particular, boundary artifacts were largely suppressed in the proposed imaging technique. Entropy enables using a small window for implementing ultrasound parametric imaging.

原文English
文章編號41004
期刊Scientific reports
7
DOIs
出版狀態Published - 2017 一月 20

All Science Journal Classification (ASJC) codes

  • General

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