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Assessment of bone density using ultrasonic backscatter
1Center for Devices and Radiological Health, Food and Drug Administration, Rockville, MD 20852, USA. KAW@CDRH.FDA.GOV
Ultrasound in Medicine & Biology
|August 8, 1998
Summary
Ultrasonic backscatter shows promise for assessing bone status, offering a non-ionizing alternative to X-rays. This method correlates well with CT scans, suggesting its utility for evaluating bone architecture and density.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Materials Science
Background:
- Current bone densitometry methods (X-ray, radioisotope) have limitations.
- Ultrasound offers a low-cost, portable, non-ionizing alternative.
- Ultrasonic backscatter may reveal microstructural information beyond attenuation and speed.
Purpose of the Study:
- To investigate the effectiveness of ultrasonic backscatter for bone status assessment.
- To explore ultrasonic backscatter as a complement or alternative to traditional densitometry.
- To correlate ultrasonic backscatter data with computed tomography (CT) bone densitometry.
Main Methods:
- Acquired ultrasonic backscatter data at 2.25 MHz.
- Acquired CT bone densitometry data from 10 healthy volunteers.
- Analyzed the correlation between CT and ultrasonic backscatter measurements.
Main Results:
- A high correlation (r = 0.87, p < 0.001) was found between CT and ultrasonic backscatter.
- The envelope signal-to-noise ratio suggests a large number of scatterers and specific statistical properties.
- Results indicate ultrasonic backscatter is sensitive to microstructural variations.
Conclusions:
- Ultrasonic backscatter shows significant promise for bone status assessment.
- It may serve as a valuable adjunct or substitute for existing ultrasonic and X-ray methods.
- This technique could provide insights into bone architecture and fracture risk.