Ultrasonic Measurement of Luminal Surface Roughness of Carotid Artery Wall with Removal of Local Displacement Induced by Blood Vessel Pulsation

Shohei Mori, Takahisa Abe, Mototaka Arakawa, Jens E. Wilhjelm, Hiroshi Kanai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Measurement of roughness in tens of microns on the luminal surface of the arterial wall is expected to provide the basis for an extremely early diagnosis of atherosclerosis. We have previously proposed a method for measuring the surface profile with micron-order precision by exploiting the longitudinal displacement due to pulsation and measuring the radial displacement due to surface roughness. This method allows estimation of the surface profile without influence by the region of heterogeneous sound velocity between the carotid artery and the skin. However, since the radial displacement of the carotid artery wall measured by ultrasound is not only due to the surface roughness but also the artery expansion due to pulsation, the latter has to be removed. In the present study, a novel method for locally removing radial displacements due to pulsation is proposed by using the spatial distribution of the pulsation component. The proposed method was verified by using a target consisting of urethane resin with a 10-µm-high sawtooth shape on the surface. The agreement with the actual profile was significantly improved by the proposed method. This result indicates that locally removing the pulsation component by the proposed method is useful for accurately estimating the micron-order surface profile of the arterial wall.

Original languageEnglish
Title of host publicationIUS 2020 - International Ultrasonics Symposium, Proceedings
PublisherIEEE Computer Society
ISBN (Electronic)9781728154480
DOIs
Publication statusPublished - 2020 Sep 7
Event2020 IEEE International Ultrasonics Symposium, IUS 2020 - Las Vegas, United States
Duration: 2020 Sep 72020 Sep 11

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2020-September
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2020 IEEE International Ultrasonics Symposium, IUS 2020
CountryUnited States
CityLas Vegas
Period20/9/720/9/11

Keywords

  • Atherosclerosis
  • Cardiovascular disease
  • Measurement of surface roughness in micron-scale
  • Ultrasound

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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