Needle tip echogenicity. A study with real time ultrasound

Area of Science:

• Medical imaging
• Biotechnology
• Ultrasound technology

Background:

• Accurate needle tip visualization is critical for successful ultrasound-guided biopsies.
• Current methods for assessing needle visibility can be limited.

Purpose of the Study:

• To investigate factors influencing needle tip echo (NTE) intensity.
• To optimize needle design and ultrasound parameters for enhanced visualization during biopsy procedures.

Main Methods:

• A testing device was developed to measure NTE intensity.
• Needle parameters including angle of incidence, diameter, bevel angle, and orientation were evaluated.
• Measurements were performed using both A-mode and B-mode ultrasound.

Main Results:

• NTE intensity showed a positive linear correlation with the angle of incidence in both A-mode and B-mode.
• A linear correlation was observed between NTE intensity and needle diameter in A-mode, and an exponential correlation in B-mode.
• Needle tip bevel angle did not significantly affect NTE intensity.
• Optimal echo intensity was achieved when the needle tip opening was oriented at 180 degrees to the transducer.

Conclusions:

• Angle of incidence and needle diameter are key determinants of NTE intensity.
• Needle orientation significantly impacts visualization, with 180 degrees providing the strongest echo.
• Findings can inform the design of ultrasound probes and biopsy needles for improved guidance.