Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study
Purpose To evaluate needle visibility in ultrasound under contrast mode conditions. Materials and Methods Needle visibility was evaluated for bevel, EchoTip® and shaft of 18G Chiba biopsy needle with a 9 MHz linear probe (GE Logiq E9). Insertion angles varied between 30°(steep) and 90°(parallel to...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Georg Thieme Verlag KG
2017-04-01
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| Series: | Ultrasound International Open |
| Subjects: | |
| Online Access: | http://www.thieme-connect.de/DOI/DOI?10.1055/s-0043-101511 |
| _version_ | 1818610910826070016 |
|---|---|
| author | Marga B. Rominger Katharina Martini Evelyn Dappa Gilbert Puippe Volker Klingmüller Thomas Frauenfelder Sergio J. Sanabria |
| author_facet | Marga B. Rominger Katharina Martini Evelyn Dappa Gilbert Puippe Volker Klingmüller Thomas Frauenfelder Sergio J. Sanabria |
| author_sort | Marga B. Rominger |
| collection | DOAJ |
| description | Purpose To evaluate needle visibility in ultrasound under contrast mode conditions.
Materials and Methods Needle visibility was evaluated for bevel, EchoTip® and shaft of 18G Chiba biopsy needle with a 9 MHz linear probe (GE Logiq E9). Insertion angles varied between 30°(steep) and 90°(parallel to the probe surface). The acoustic output varied from 5–28%. 2 different contrast mode presets with either 'Amplitude Modulation' (Penetration) or 'Phase Inversion Harmonics' (High Resolution) were assessed. All other imaging parameters were kept constant. The visibility of bevel, EchoTip® and shaft was assessed for grayscale and color-coded images with a 3-point Likert-like scale (not, poorly, well visible) by 2 independent readers. The echogenicity of the needle bevel, EchoTip® and shaft was assessed in deciBel (dB) on the color-coded images.
Results With the parallel insertion angle, all needle areas were well visible. With steep insertion the EchoTip® was the only visible area. High Resolution was superior to Penetration (p<0.001). The visibility and echogenicity of the needle bevel (r
grayscale=0.109, pgrayscale=0.178; r
color-coded=0.236, pcolor-coded=0.266; r
dB=0.956, pdB=0.001), EchoTip® (r
grayscale+= 0.477, pgrayscale+= 0.018; r
color-coded=0.540, pcolor-coded+= 0.006; r
dB=0.911, pdB=0.001) and shaft (r
grayscale=0.124, pgrayscale=0.563; r
color-coded=0.061, pcolor-coded+= 0.775; r
dB+= 0.926, pdB=0.001) increased with increasing acoustic output. Grayscale images were superior to color-coded images for needle visibility (p=0.004).
Conclusion Parallel needle insertion, use of an echogenic tip, adequate choice of presets, increased acoustic output, and dual view of grayscale and color-coded images improve needle visibility in ultrasound under contrast mode conditions. |
| first_indexed | 2024-12-16T15:21:57Z |
| format | Article |
| id | doaj.art-19e5a4ef67dc459cae743ad941da0314 |
| institution | Directory Open Access Journal |
| issn | 2509-596X 2199-7152 |
| language | English |
| last_indexed | 2024-12-16T15:21:57Z |
| publishDate | 2017-04-01 |
| publisher | Georg Thieme Verlag KG |
| record_format | Article |
| series | Ultrasound International Open |
| spelling | doaj.art-19e5a4ef67dc459cae743ad941da03142022-12-21T22:26:37ZengGeorg Thieme Verlag KGUltrasound International Open2509-596X2199-71522017-04-010302E82E8810.1055/s-0043-101511Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo StudyMarga B. Rominger0Katharina Martini1Evelyn Dappa2Gilbert Puippe3Volker Klingmüller4Thomas Frauenfelder5Sergio J. Sanabria6University Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandUniversity Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandUniversity Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandUniversity Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandUniversity Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandUniversity Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, SwitzerlandETH, Computer Vision Laboratory, Zurich, SwitzerlandPurpose To evaluate needle visibility in ultrasound under contrast mode conditions. Materials and Methods Needle visibility was evaluated for bevel, EchoTip® and shaft of 18G Chiba biopsy needle with a 9 MHz linear probe (GE Logiq E9). Insertion angles varied between 30°(steep) and 90°(parallel to the probe surface). The acoustic output varied from 5–28%. 2 different contrast mode presets with either 'Amplitude Modulation' (Penetration) or 'Phase Inversion Harmonics' (High Resolution) were assessed. All other imaging parameters were kept constant. The visibility of bevel, EchoTip® and shaft was assessed for grayscale and color-coded images with a 3-point Likert-like scale (not, poorly, well visible) by 2 independent readers. The echogenicity of the needle bevel, EchoTip® and shaft was assessed in deciBel (dB) on the color-coded images. Results With the parallel insertion angle, all needle areas were well visible. With steep insertion the EchoTip® was the only visible area. High Resolution was superior to Penetration (p<0.001). The visibility and echogenicity of the needle bevel (r grayscale=0.109, pgrayscale=0.178; r color-coded=0.236, pcolor-coded=0.266; r dB=0.956, pdB=0.001), EchoTip® (r grayscale+= 0.477, pgrayscale+= 0.018; r color-coded=0.540, pcolor-coded+= 0.006; r dB=0.911, pdB=0.001) and shaft (r grayscale=0.124, pgrayscale=0.563; r color-coded=0.061, pcolor-coded+= 0.775; r dB+= 0.926, pdB=0.001) increased with increasing acoustic output. Grayscale images were superior to color-coded images for needle visibility (p=0.004). Conclusion Parallel needle insertion, use of an echogenic tip, adequate choice of presets, increased acoustic output, and dual view of grayscale and color-coded images improve needle visibility in ultrasound under contrast mode conditions.http://www.thieme-connect.de/DOI/DOI?10.1055/s-0043-101511ultrasoundbiopsycontrast agents |
| spellingShingle | Marga B. Rominger Katharina Martini Evelyn Dappa Gilbert Puippe Volker Klingmüller Thomas Frauenfelder Sergio J. Sanabria Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study Ultrasound International Open ultrasound biopsy contrast agents |
| title | Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study |
| title_full | Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study |
| title_fullStr | Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study |
| title_full_unstemmed | Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study |
| title_short | Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study |
| title_sort | ultrasound needle visibility in contrast mode imaging an in vitro and ex vivo study |
| topic | ultrasound biopsy contrast agents |
| url | http://www.thieme-connect.de/DOI/DOI?10.1055/s-0043-101511 |
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