Computational cost reduction by avoiding ray-linking iteration in bent-ray method for sound speed image reconstruction in ultrasound computed tomography

Xiaolei Qu, Takashi Azuma, Hongxiang Lin, Hirofumi Nakamura, Satoshi Tamano, Shu Takagi, Shin Ichiro Umemura, Ichiro Sakuma, Yoichiro Matsumoto

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Bent-ray reconstruction method can improve sound speed image quality, compared with straight-ray reconstruction. However, it suffers from timeconsuming ray-linking iteration, because multiple rays with different launch angles have to be iteratively traced to find the ray linking the given emitter and receiver. In this study, a novel virtual receiver bent-ray method (VRBRM) was proposed to avoid the ray-linking iteration. In this method, the angle of the straight line connecting a given emitter and receiver is calculated as the launch angle, and only one ray with the calculated launch angle is traced and its arrival position at the ring transducer is recorded as the virtual receiver position. Then, the sound propagation time from the given emitter to the virtual receiver is interpolated. The results of simulation, phantom and ex vivo experiments demonstrate that the proposed method can reduce the reconstruction time to about 30% without reduction of the reconstruction quality.

Original languageEnglish
Article number07JF14
JournalJapanese journal of applied physics
Volume56
Issue number7
DOIs
Publication statusPublished - 2017 Jul

ASJC Scopus subject areas

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

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