Accuracy improvement of multimodal measurement of speed of sound based on image processing

Nitta Naotaka; Kaya Akio; Misawa Masaki; Hyodo Koji; Numano Tomokazu

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Accuracy improvement of multimodal measurement of speed of sound based on image processing

机译：基于图像处理的多模态声速测量精度的提高

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Since the speed of sound (SOS) reflects tissue characteristics and is expected as an evaluation index of elasticity and water content, the noninvasive measurement of SOS is eagerly anticipated. However, it is difficult to measure the SOS by using an ultrasound device alone. Therefore, we have presented a noninvasive measurement method of SOS using ultrasound (US) and magnetic resonance (MR) images. By this method, we determine the longitudinal SOS based on the thickness measurement using the MR image and the time of flight (TOF) measurement using the US image. The accuracy of SOS measurement is affected by the accuracy of image registration and the accuracy of thickness measurements in the MR and US images. In this study, we address the accuracy improvement in the latter thickness measurement, and present an image-processing-based method for improving the accuracy of thickness measurement. The method was investigated by using in vivo data obtained from a tissue-engineered cartilage implanted in the back of a rat, with an unclear boundary. (C) 2017 The Japan Society of Applied Physics

机译：由于声速（SOS）反映了组织特征并且被期望作为弹性和水含量的评估指标，因此迫切期望对SOS进行无创测量。但是，仅通过使用超声波装置来测量SOS是困难的。因此，我们提出了一种使用超声（US）和磁共振（MR）图像的SOS的无创测量方法。通过这种方法，我们基于使用MR图像的厚度测量值和使用US图像的飞行时间（TOF）测量值确定纵向SOS。 SOS测量的准确性受图像配准的准确性以及MR和US图像中厚度测量的准确性的影响。在这项研究中，我们解决了后者厚度测量中的精度提高问题，并提出了一种基于图像处理的方法来提高厚度测量的精度。通过使用体内数据研究该方法，该体内数据是从组织工程化的软骨植入大鼠背部后获得的，边界不清楚。（C）2017日本应用物理学会

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《Japanese journal of applied physics》 |2017年第7s1期|07JF17.1-07JF17.5|共5页
作者
Nitta Naotaka; Kaya Akio; Misawa Masaki; Hyodo Koji; Numano Tomokazu;
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Natl Inst Adv Ind Sci & Technol, Hlth Res Inst, Tsukuba, Ibaraki 3058564, Japan;

Natl Inst Adv Ind Sci & Technol, Hlth Res Inst, Tsukuba, Ibaraki 3058564, Japan;

Natl Inst Adv Ind Sci & Technol, Hlth Res Inst, Tsukuba, Ibaraki 3058564, Japan;

Natl Inst Adv Ind Sci & Technol, Human Informat Res Inst, Tsukuba, Ibaraki 3058561, Japan;

Tokyo Metropolitan Univ, Dept Radiol Sci, Tokyo 116855, Japan;

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Accuracy improvement of multimodal measurement of speed of sound based on image processing

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