Correlation between ultrasonic power spectrum and bone density on the heel

Area of Science:

• Biomedical Engineering
• Radiology
• Orthopedics

Background:

• Bone density assessment is crucial for diagnosing osteoporosis.
• Quantitative Ultrasound (QUS) parameters like Broadband Ultrasound Attenuation (BUA) and Speed of Sound (SOS) are established methods.
• Exploring novel QUS parameters from ultrasonic power spectrum may offer enhanced diagnostic capabilities.

Purpose of the Study:

• To evaluate the correlation between ultrasonic power spectrum parameters and bone mineral density (BMD).
• To determine the effectiveness of specific power spectrum parameters for bone density evaluation.

Main Methods:

• Fifty participants (24-72 years) underwent lumbar spine BMD measurements.
• Calcaneal ultrasonic power spectrum analysis was performed at 0.5MHz.
• Three normalized power spectrum parameters were analyzed: principle frequency (PF), frequency band (FB), and amplitude for principle frequency (APF).

Main Results:

• APF showed the strongest correlation with lumbar spine BMD (r=-0.71, p<0.001).
• PF (r=-0.48, p<0.001) and FB (r=0.48, p<0.001) also correlated significantly with BMD.
• APF demonstrated superior performance in evaluating bone density compared to PF and FB.

Conclusions:

• Ultrasonic power spectrum parameters, especially APF, are significantly correlated with BMD.
• APF offers a promising metric for bone density assessment, potentially providing information beyond traditional QUS measures.
• A regression model incorporating PF, FB, and APF showed improved BMD prediction compared to models using only BUA and SOS.