Print Email Facebook Twitter Compliant joint echogenicity in ultrasound images: towards highly visible steerable needles Title Compliant joint echogenicity in ultrasound images: towards highly visible steerable needles Author van de Berg, N.J. (TU Delft Medical Instruments & Bio-Inspired Technology) Sánchez-Margallo, Juan A. (University of Extremadura; SINTEF) Langø, Thomas (SINTEF) van den Dobbelsteen, J.J. (TU Delft Medical Instruments & Bio-Inspired Technology) Contributor Fei, Baowei (editor) Webster, Robert J. (editor) Date 2018 Abstract Radio frequency ablation is commonly used in the treatment of hepatocellular carcinoma. Clinicians rely on imaging techniques, such as medical ultrasound, to confirm an accurate needle placement. This accuracy may improve by means of active needle steering techniques, which are currently in development. Needle steering will likely increase the clinician’s reliance on imaging techniques. This has motivated the study of the echogenicity of steerable needle joint structures. Two needles were manufactured with arrays of kerfs, similar to the compliant joint structures found in steerable needles. The needle visibility was compared to a smooth surface needle and a commercially available RFA needle. The visibility was quantified for both the shaft and tip, by means of a contrast-to-noise ratio (CNR). CNR data were obtained for three insertion angles. The results show that the CNRs of the compliant joint structures were consistently higher than those of the smooth surface needle, whereas they were either higher than or comparable to those of the RFA needle. For acute insertion angles, the bevel tip of the RFA needle had a higher CNR than the conical tip of the kerfed needles, motivating the extension of this visibility study to the full needle design. Subject Steerable NeedleUltrasonographyVisibilityRadio-frequency ablation (RFA)Contrast-to-noise ratio (CNR)Image guidanceInstrument tracking To reference this document use: http://resolver.tudelft.nl/uuid:1ab28864-d708-4817-a25d-ef7c94827912 DOI https://doi.org/10.1117/12.2293501 Publisher SPIE, Bellingham, WA, USA Source Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling Event Medical Imaging 2018: Ultrasonic Imaging and Tomography, 2018-02-10 → 2018-02-15, Houston, United States Series Proceedings of SPIE, 1605-7422, 10576 Part of collection Institutional Repository Document type conference paper Rights © 2018 N.J. van de Berg, Juan A. Sánchez-Margallo, Thomas Langø, J.J. van den Dobbelsteen Files PDF 105760X.pdf 505.04 KB Close viewer /islandora/object/uuid:1ab28864-d708-4817-a25d-ef7c94827912/datastream/OBJ/view