Print Email Facebook Twitter A methodical quantification of needle visibility and echogenicity in ultrasound images Title A methodical quantification of needle visibility and echogenicity in ultrasound images Author van de Berg, N.J. (TU Delft Medical Instruments & Bio-Inspired Technology) Sánchez-Margallo, Juan A. (SINTEF; University of Extremadura) van Dijke, A.P. (TU Delft Medical Instruments & Bio-Inspired Technology) Langø, Thomas (SINTEF) van den Dobbelsteen, J.J. (TU Delft Medical Instruments & Bio-Inspired Technology) Date 2019 Abstract During ultrasound-guided percutaneous interventions, needle localization can be a challenge. To increase needle visibility, enhancements of both the imaging methods and the needle surface properties have been investigated. However, a methodical approach to compare potential solutions is currently unavailable. The work described here involves automated image acquisition, analysis and reporting techniques to collect large amounts of data efficiently, delineate relevant factors and communicate effects. Data processing included filtering, line fitting and image intensity analysis steps. Foreground and background image samples were used to compute a contrast-to-noise ratio or a signal ratio. The approach was evaluated in a comparative study of commercially available and custom-made needles. Varied parameters included needle material, diameter and surface roughness. The shafts with kerfed patterns and the trocar and chiba tips performed best. The approach enabled an intuitive polar depiction of needle visibility in ultrasound images for a large range of insertion angles. Subject Contrast-to-noise ratioEchogenicityExperimental methodsHigh-echoic rangeNeedle interventionsPolyvinyl alcoholSignal ratioUltrasoundVisibility To reference this document use: http://resolver.tudelft.nl/uuid:539e09a1-3f30-44f2-a303-028ec4bdc2dc DOI https://doi.org/10.1016/j.ultrasmedbio.2018.10.004 ISSN 0301-5629 Source Ultrasound in Medicine & Biology, 45 (4), 998-1009 Part of collection Institutional Repository Document type journal article Rights © 2019 N.J. van de Berg, Juan A. Sánchez-Margallo, A.P. van Dijke, Thomas Langø, J.J. van den Dobbelsteen Files PDF 1_s2.0_S0301562918304320_main.pdf 2.66 MB Close viewer /islandora/object/uuid:539e09a1-3f30-44f2-a303-028ec4bdc2dc/datastream/OBJ/view