文档介绍：Modeling Twinkling Artifact in sonography
Hamid Behnam*, Arash Hajjam** and Hamed Rakhshan*
*: Bio-Medical Engineering group, Department of Electrical Engineering,
Iran University of Science and Technology, Tehran, Iran, Email: ******@
**: Department of Electrical puter Engineering
University of Denver, Denver, CO, USA 80208
Abstract-The purpose of this work was to re-examine the theories has pointed out to the sonography device as a
reasons for the appearance of power doppler artifact main underlying cause of the artifact [5], most other
referred to as "twinkling" artifact, which is usually observed theories concentrate on the physical and chemical
in hyperechoic regions and which introduces ambiguity in attributes of the object being imaged as the basic cause of
diagnosis. Two key parameters: physical dimensions of the
analyzed object and its roughness or irregular shape were this artifact [6,7]. Anyhow, this artifact has previously
initially considered. Several tests were done on Renal and played a phenomenal role in detection and diagnosis for
artificially generated stones in order to visualize twinkling various medical applications [8]-[11]. Therefore this
artifact and to obtain meaningful results. strengthens the cause to investigate and model this artifact
It is shown that “Radiation force” which is generated by a and