ArticleJournal of medical ultrasonics (2001)2026
Phantom experiment for thoracic spine gap delineation using steering-transmitted ultrasound to assist epidural anesthesia.
Article in Journal of medical ultrasonics (2001), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeEpidural anesthesia under real-time ultrasound guidance has been studied to enhance puncture safety. However, in the thoracic spine, where the anatomy is complex and the interlaminar space is narrow, improved image quality is necessary. Because imaging quality is degraded in bones that are greatly tilted relative to the probe, we aimed to improve the imaging quality by steering the transmitted ultrasonic beam.
methodsWe investigated a method to improve bone visibility by selecting appropriate transmit steering angles and receiving aperture ranges for each of the two bones forming the interlaminar space, and by compensating for the directivity of the receiving elements.
resultsThe proposed method emphasized the delineation of a bone phantom near the gap corresponding to the puncture site. Furthermore, when comparing the contrast ratio in the region of interest of the bone and gap areas, the proposed method showed an improvement of 24.2 dB on the left side and 4.2 dB on the right side compared to the conventional B-mode image.
conclusionThe proposed method was confirmed to emphasize the bones and is expected to improve the image quality of the thoracic spine gap.
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