Measurement of angular dependence of ultrasonic echo for estimation of surface roughness

Kazuki Kudo, Hideyuki Hasegawa, Hiroshi Kanai

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Atherosclerosis is the main cause of circulatory diseases, and it is very important to diagnose atherosclerosis in its early stage. In an early stage of atherosclerosis, the luminal surface of an arterial wall becomes rough due to injury of the endothelium. Conventional ultrasonic diagnostic equipments cannot detect such micron-order surface roughness because their spatial resolution is, at most, 100 μm. In this study, for the accurate detection of surface roughness, ultrasonic beams were insonified from various angles relative to the surface of an object that has a micron-order asperity. Then, we focused on the angular dependence of echo amplitude and frequency characteristics in both temporal and spatial domains. Using this method, it is shown that the angular dependence and frequency characteristics vary when an object has a surface roughness that cannot be detected by conventional B-mode imaging using linear scanning.

Original languageEnglish
Pages (from-to)4873-4880
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number7 B
Publication statusPublished - 2007 Jul 26


  • Angular dependence
  • Atherosclerosis
  • Surface roughness
  • Temporal and spatial frequency
  • Ultrasonic beam steering

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


Dive into the research topics of 'Measurement of angular dependence of ultrasonic echo for estimation of surface roughness'. Together they form a unique fingerprint.

Cite this