Problems in ultrasonic estimates of septal thickness

Area of Science:

• Cardiology
• Medical Imaging
• Ultrasound Technology

Background:

• Echocardiographic identification of endocardial echoes can be inaccurate due to cardiac anatomy and instrumentation.
• Existing methods face challenges in precisely locating endocardial borders.
• Accurate endocardial echo identification is vital for reliable septal thickness measurements.

Purpose of the Study:

• To identify and address problems affecting the accuracy of endocardial echo identification.
• To develop and validate new criteria for accurate endocardial echo identification.
• To improve the reproducibility of septal thickness measurements using echocardiography.

Main Methods:

• Study involved a cadaver model and 13 patients.
• Echographic contrast techniques were used for direct identification.
• Analysis focused on identifying specific echo characteristics and artifacts.

Main Results:

• Echographic contrast agents highlight endocardial echoes within the ultrasonic beam.
• Specular reflectors and wide beam angles can create false echoes.
• New criteria (septal notch, specular quality, parallel myocardial echoes) allowed accurate identification in 11/13 patients without contrast.

Conclusions:

• Established criteria improve endocardial echo identification accuracy.
• These criteria enhance the reliability of septal thickness measurements.
• The findings offer guidelines for developing more precise echocardiographic measurement techniques.