A Novel Dual-Element Catheter for Improving Non-Uniform Rotational Distortion in Intravascular Ultrasound

Baoqiang Liu, Min Su, Zhiqiang Zhang, Rong Liu, Lei Sun, Hairong Zheng, Weibao Qiu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

For the early diagnosis of atherosclerosis and interventions, intravascular ultrasound (IVUS) is a valuable tool for intravascular luminal imaging. Compared with the array-based method, mechanically rotating IVUS catheters dominate the clinical applications because of their less complexity and better suitability for high-frequency ultrasound imaging. However, mechanically rotating catheters are suffering from non-uniform rotational distortion (NURD) which hinders accurate image acquisition. In this study, a dual-element imaging catheter is proposed, in which two elements with the same frequency and similar performance are assembled in a back-to-back arrangement. When the catheter encounters a NURD due to acute bending, the abnormal image of one element can be replaced by the normal image of the opposite element, thus eliminating the NURD in the reconstructed image. Moreover, two images can be obtained in one rotation and the imaging frame rate is doubled in the absence of NURD. The performance of the two elements was quantitatively assessed by a wire phantom. And the complementary imaging protocols were evaluated by a tissue phantom and <italic>ex vivo</italic> porcine vessel. The results show that the proposed strategy can be promising in clinical studies.

Original languageEnglish
Pages (from-to)1768-1774
Number of pages7
JournalIEEE Transactions on Biomedical Engineering
Volume70
Issue number6
DOIs
Publication statusPublished - 1 Jun 2023

Keywords

  • Intravascular ultrasound (IVUS)
  • dual-element catheter
  • non-uniform rotation distortion (NURD)
  • ultrasound imaging system

ASJC Scopus subject areas

  • Biomedical Engineering

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