Monitoring of Portal Vein by Three-dimensional Ultrasound Image Tracking and Registration: Toward Hands-free Monitoring of Internal Organs

IF 0.8 Q4 ENGINEERING, BIOMEDICAL Advanced Biomedical Engineering Pub Date : 2020-01-01 DOI:10.14326/abe.9.1
Iori Terada, Yuki Togoe, Toshiki Teratoko, Tomohiro Ueno, K. Ishizu, Y. Fujii, T. Shiina, N. Sugimoto
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引用次数: 1

Abstract

Ultrasound is a convenient non-invasive imaging modality used for the diagnosis or detection of various diseases and assessment of therapeutic effects. However, when imaging internal organs, the ultrasound probe must be handled by an operator. The ability to perform hands-free ultrasound imaging of internal organs is likely to offer an unprecedented advantage in various situations such as internal organ monitoring during exercise tests and prolonged monitoring. Toward this end, we have developed a new method of hands-free monitoring using three-dimensional (3D) ultrasound and used this method in portal vein monitoring, which is important for functional evaluation of hepatic and gastrointestinal systems. In previous studies, we developed a hand-made probe holder and used it to capture images of the portal vein, using image tracking and registration to compare the same position of the portal vein. In this study, we first used an abdomen phantom to assess image tracking qualitatively and quantitatively. After validating the method on the phantom, we monitored the portal vein in three healthy subjects using our 3D ultrasound method. Image tracking and registration of the portal veins in three subjects were successfully performed offline. Finally, respiratory analysis and vein diameter measurement were performed based on the image tracking results. The respiratory analysis quantified the respiration-induced portal vein movements. The vein diameter showed changes that might be induced by respiration and heartbeat. These results indicate that our 3D ultrasound method is a potentially useful tool for hands-free monitoring of internal organs.
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门静脉的三维超声图像跟踪与配准监测:面向内脏器官的免提监测
超声是一种方便的无创成像方式,用于诊断或检测各种疾病和评估治疗效果。然而,当对内部器官成像时,超声探头必须由操作员操作。对内部器官进行免提超声成像的能力可能会在各种情况下提供前所未有的优势,例如在运动测试期间进行内部器官监测和长时间监测。为此,我们开发了一种使用三维超声的免提监测新方法,并将其用于门静脉监测,这对肝脏和胃肠道系统的功能评估具有重要意义。在之前的研究中,我们开发了一种手工制作的探头支架,并使用它来捕获门静脉的图像,使用图像跟踪和配准来比较门静脉的相同位置。在这项研究中,我们首先使用腹部幻影来定性和定量地评估图像跟踪。在幻影上验证了该方法后,我们使用3D超声方法监测了三个健康受试者的门静脉。成功地对3名受试者进行了门静脉的离线图像跟踪配准。最后,根据图像跟踪结果进行呼吸分析和静脉直径测量。呼吸分析量化了呼吸引起的门静脉运动。静脉直径的变化可能是由呼吸和心跳引起的。这些结果表明,我们的3D超声方法是一种潜在的有用的工具,用于内部器官的免提监测。
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来源期刊
Advanced Biomedical Engineering
Advanced Biomedical Engineering ENGINEERING, BIOMEDICAL-
CiteScore
1.40
自引率
10.00%
发文量
15
审稿时长
15 weeks
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