Rominger Marga B, Martini Katharina, Dappa Evelyn, Puippe Gilbert, Klingmüller Volker, Frauenfelder Thomas, Sanabria Sergio J
University Hospital Zurich, University of Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, Switzerland.
University Hospital Mainz, Department of Diagnostic and Interventional Radiology, Mainz, Germany.
Ultrasound Int Open. 2017 Apr;3(2):E82-E88. doi: 10.1055/s-0043-101511. Epub 2017 Jun 22.
To evaluate needle visibility in ultrasound under contrast mode conditions.
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.
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 ( =0.109, p =0.178; =0.236, p =0.266; =0.956, p =0.001), EchoTip ( += 0.477, p += 0.018; =0.540, p += 0.006; =0.911, p =0.001) and shaft ( =0.124, p =0.563; =0.061, p += 0.775; += 0.926, p =0.001) increased with increasing acoustic output. Grayscale images were superior to color-coded images for needle visibility (p=0.004).
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.
评估在超声造影模式下针的可视性。
使用9MHz线性探头（GE Logiq E9）对18G千叶活检针的斜面、回声尖端和针杆的可视性进行评估。插入角度在30°（陡峭）至90°（平行于探头表面）之间变化。声输出在5%至28%之间变化。评估了2种不同的造影模式预设，即“幅度调制”（穿透）或“相位反转谐波”（高分辨率）。所有其他成像参数保持不变。由2名独立阅片者使用3分制李克特量表（不可见、可见性差、可见性良好）对灰度图像和彩色编码图像的斜面、回声尖端和针杆的可视性进行评估。在彩色编码图像上以分贝（dB）为单位评估针斜面、回声尖端和针杆的回声性。
在平行插入角度下，针的所有区域均清晰可见。在陡峭插入时，回声尖端是唯一可见的区域。高分辨率优于穿透模式（p<0.001）。随着声输出增加，针斜面（ =0.109，p =0.178； =0.236，p =0.266； =0.956，p =0.001）、回声尖端（ +=0.477，p +=0.018； =0.540，p +=0.006； =0.911，p =0.001）和针杆（ =0.124，p =0.563； =0.061，p +=0.775； +=0.926，p =0.001）的可视性和回声性增加。对于针的可视性，灰度图像优于彩色编码图像（p=0.004）。
针的平行插入、使用回声增强尖端、适当选择预设、增加声输出以及灰度图像和彩色编码图像的双视图可提高超声造影模式下针的可视性。
