Changes in Ultrasonographic Echogenicity and Visibility of Needles with Changes in Angles of Insonation
Section snippets
Devices
Commercial 21or 22-gauge needles with a dimpled distal shaft (Echotip; Cook, Bloomington, IN), a prototype needle with more dimples (Cook), an echogenic textured needle (Mini-Stick; Meditech, Boston, MA), a polymeric coated needle (Echo-Coat, STS Biopolymers, Henrietta, NY), and a non–echo-enhanced plasticsheathed needle (Surflo; Terumo, Tokyo, Japan) were tested. The Echotip needle (Cook) had 54 dimples per low power microscopic field and the prototype needle (Cook) had 70 dimples per low
RESULTS
At 90° angles of insonation, all needle types were easily seen and had similar echogenic values ranging from 60.8 to 75.8 EU (Fig 3). At all angles of insonation less than 90°, the prototype needle (Cook) had the highest average echogenicity. Needle echogenicity decreased as the angle of insonation decreased in all cases, but the magnitude of this decrease varied with each needle. The sheathed needle, Surflo (Terumo), demonstrated the steepest slope (had the greatest drop in visibility) across
DISCUSSION
US guidance for invasive procedures is a well-established technique that continues to gain in popularity. In most situations it is used with high success rates; however, needle visibility remains a limitation in many situations. Good needle visibility is expected in tissues that are relatively sonolucent and when angles of insonation approach 90°. Needle visualization is a problem with targets of increased depth or tissue echogenicity and when targets require small angles of insonation. Factors
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Cited by (76)
Surface Texturing Design to Enhance Echogenicity of Biopsy Needles During Endoscopic Ultrasound Imaging
2020, Ultrasound in Medicine and BiologyA Methodical Quantification of Needle Visibility and Echogenicity in Ultrasound Images
2019, Ultrasound in Medicine and BiologyCitation Excerpt :No apparent beneficial results were, however, obtained with the use of frequency compound imaging or harmonic imaging techniques (Mesurolle et al. 2006). In all, the most dramatic improvements came from adaptations of the needle surface (Nichols et al. 2003), by means of coating (de Korte et al. 2012; Gottlieb et al. 1998), material scoring (Charboneau et al. 1990), denting (Miura et al. 2014) or introducing screw or sawtooth patterns (Bigeleisen et al. 2016; Reading et al. 1987). Finally, tip localization in color Doppler mode can be improved by actively vibrating the needle during use (Adebar et al. 2014; Cabreros et al. 2015; Harmat et al. 2006; Klein et al. 2007).
EUS Needle Identification Comparison and Evaluation study (with videos)
2016, Gastrointestinal EndoscopyCitation Excerpt :It is interesting to note that the needle echogenicity is greater when the needles are inserted at a higher angle (about 50 degrees) than at a lower angle (30 degrees), referred to as the “higher angle better echogenicity” phenomenon. This finding collaborates study results published in radiology literature showing that needle size, needle angle respect to the transducer, and needle movement affect needle visualization.7-12 The authors hypothesize that this phenomenon is related to echo reflection and its associated echo reception density (Fig. 7).
Automated angular measurement for puncture angle using a computer-aided method in ultrasound-guided peripheral insertion
2024, Physical and Engineering Sciences in Medicine
Presented at SIR 2003 annual meeting.
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None of the authors have identified a potential conflict of interest.