A clinical distortion index for compressed echocardiogram evaluation: recommendations for Xvid codec

Area of Science:

• Medical Imaging
• Signal Processing
• Cardiology

Background:

• Echocardiogram compression is essential for efficient data transmission and storage.
• Assessing the diagnostic quality of compressed echocardiograms remains a challenge.
• Existing metrics may not fully capture the clinical impact of compression artifacts.

Purpose of the Study:

• To introduce a novel clinical distortion index for evaluating compressed echocardiograms.
• To establish a method for comparing the clinical performance of video codecs.
• To provide recommendations for optimal echocardiogram compression rates.

Main Methods:

• Development of a clinical distortion index based on cardiologists' assessments.
• Utilizing a clinical testbed with blind and semi-blind testing methodologies.
• Application of the index to evaluate the Xvid video codec for echocardiogram compression.

Main Results:

• The clinical distortion index effectively measures the decrease in diagnostic content.
• Recommended minimum transmission rates were established: 768 kbit/s for 2D and M modes.
• Lower rates (256 kbit/s) were deemed sufficient for color Doppler and pulsed/continuous Doppler modes.

Conclusions:

• The clinical distortion index offers a valuable tool for assessing echocardiogram compression quality.
• The index facilitates objective comparisons of video codecs from a clinical standpoint.
• Specific transmission rate recommendations can guide clinical practice for compressed echocardiograms.