Four-year experience with a clinical ultrasound quality control program

Area of Science:

• Medical Imaging
• Diagnostic Ultrasound
• Quality Control

Background:

• Ultrasound (US) equipment requires robust quality control (QC) for reliable diagnostic performance.
• Existing QC programs may vary in efficiency and effectiveness in detecting equipment failures.
• A comprehensive review of a 4-year US QC program was undertaken to identify areas for optimization.

Purpose of the Study:

• To evaluate the effectiveness of different tests within an ultrasound QC program.
• To determine the most efficient methods for identifying equipment failures in ultrasound scanners and transducers.
• To optimize the ultrasound QC program for improved efficiency and effectiveness.

Main Methods:

• Analysis of 4-year ultrasound QC program data from over 45 scanners and 265 transducers.
• Evaluation of mechanical integrity, image uniformity, distance measurement accuracy, and maximum depth of penetration (DOP).
• Calculation of equipment failure rates and the proportion of failures detected by each QC test.

Main Results:

• Identified 187 equipment problems, with average annual failure rates of 10.5% for scanner components and 13.9% for transducers.
• Mechanical integrity and uniformity tests detected 25.1% and 66.3% of failures, respectively.
• Depth of penetration and distance measurement accuracy tests were ineffective in detecting equipment failures; combined tests and sonographer findings identified 98.4% of failures.

Conclusions:

• Routine ultrasound QC should prioritize quarterly mechanical integrity and uniformity assessments for all transducers.
• An optimized QC program can test a scanner with five transducers in 30 minutes or less.
• Focusing on specific, effective tests enhances the efficiency and diagnostic yield of ultrasound QC programs.