複数の超音波ボリュームを用いた3次元血管網拡張と撮像状況の変化に対する有効性の検証

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タイトル別名
  • Three-Dimensional Extension of Blood Vessel Network Using Multiple Ultrasound Volumes and Validation in Various Imaging Situations
  • フクスウ ノ チョウオンパ ボリューム オ モチイタ 3ジゲン ケッカンモウ カクチョウ ト サツゾウ ジョウキョウ ノ ヘンカ ニ タイスル ユウコウセイ ノ ケンショウ

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<p>We have conducted extraction of three-dimensional blood vessel structure by spatial extension of ultrasonic 3D images (volumes) aiming to develop ultrasound therapy. However, since acquisition of the image depended on the sense of the operator, improvement of the interface was required. In addition, verification of the effectiveness of the method has not been done in human blood vessels, including deformation of blood vessels by posture and breathing. Therefore, we propose a three-dimensional extension method of the blood vessel network by connecting multiple ultrasound volumes acquired from different directions. The information of the three-dimensional structure of blood vessel extracted from the B-mode image and Doppler signal was converted into a tree structure graph containing information of the centerline and the bifurcation points. Then we developed an interface by obtaining position and posture information of the probe measured using position measuring tracker attached to the probe, calculated the homogeneous transformation matrix, and displayed multiple volumes acquired at different timings in the same coordinate system. Furthermore, by performing spatial registration, common bifurcation points were extracted from multiple tree structure graphs to extend the blood vessel network spatially. Using the liver blood vessels in healthy persons, we succeeded to obtain a wide area of vascular networks reaching the right and left lobes. Furthermore, we confirmed that the blood vessel network structure was preserved during changes of posture and respiratory state, and validated the effectiveness of our three-dimensional extension method.</p>

収録刊行物

  • 生体医工学

    生体医工学 58 (4-5), 160-167, 2020-09-10

    公益社団法人 日本生体医工学会

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