Automated performance assessment of ultrasound systems using a dynamic phantom

Area of Science:

• Medical imaging
• Ultrasound technology
• Quality assurance

Background:

• Current medical ultrasound quality assurance methods are limited by manual processes, repeatability issues, and time constraints.
• The Edinburgh pipe phantom offers a quantitative figure of merit but requires time-consuming manual scanning.
• Routine quality assurance is crucial for maintaining diagnostic accuracy in medical ultrasound.

Purpose of the Study:

• To introduce the Dundee dynamic phantom, a novel device for automated and rapid quality assurance of medical ultrasound imaging systems.
• To overcome the limitations of manual scanning associated with existing phantom technologies.
• To provide a single figure of merit for lateral resolution that can be quickly calculated.

Main Methods:

• The Dundee dynamic phantom utilizes computer-controlled filamentary targets at varying depths within a 9.4% ethanol-water solution.
• Real-time image analysis assesses target resolution.
• A single figure of merit for lateral resolution is calculated from measurements at different depths.

Main Results:

• The Dundee dynamic phantom allows for rapid setup and automated operation, significantly reducing assessment time.
• Test results from 18 clinical ultrasound scanners demonstrated the phantom's ability to differentiate systems.
• The figure of merit correlated with scanner frequency and distinguished between older and newer ultrasound systems.

Conclusions:

• The Dundee dynamic phantom offers a viable, automated solution for medical ultrasound quality assurance.
• This device provides a rapid and quantifiable measure of lateral resolution, enhancing routine system checks.
• The phantom's ability to differentiate scanners suggests its utility in clinical settings for performance assessment.