Automatic Segmentation and Probe Guidance for Real-Time Assistance of Ultrasound-Guided Femoral Nerve Blocks

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• 作者：Erik Smistad^&lowast ; ; ^&dagger ; ; ^{ersmistad@gmail.com} ; Daniel Hø ; yer Iversen^&lowast ; ; ^&dagger ; ; Linda Leidig^&dagger ; ; Janne Beate Lervik Bakeng^&lowast ; ; Kaj Fredrik Johansen^&Dagger ; ; Frank Lindseth^&lowast ; ; ^&dagger ;
• 关键词：Regional anesthesia ; Femoral nerve ; Segmentation ; Assistant
• 刊名：Ultrasound in Medicine & Biology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：218-226
• 全文大小：1538 K
• 卷排序：43

文摘

Ultrasound-guided regional anesthesia can be challenging, especially for inexperienced physicians. The goal of the proposed methods is to create a system that can assist a user in performing ultrasound-guided femoral nerve blocks. The system indicates in which direction the user should move the ultrasound probe to investigate the region of interest and to reach the target site for needle insertion. Additionally, the system provides automatic real-time segmentation of the femoral artery, the femoral nerve and the two layers fascia lata and fascia iliaca. This aids in interpretation of the 2-D ultrasound images and the surrounding anatomy in 3-D. The system was evaluated on 24 ultrasound acquisitions of both legs from six subjects. The estimated target site for needle insertion and the segmentations were compared with those of an expert anesthesiologist. Average target distance was 8.5 mm with a standard deviation of 2.5 mm. The mean absolute differences of the femoral nerve and the fascia segmentations were about 1–3 mm.