Quantitative assessment of cartilage surface roughness in osteoarthritis using high frequency ultrasound
| Autor: | Jonathan M. Rubin, Ronald S. Adler, Charles R. Meyer, E. H. Chiang, Timothy J. Laing, Peyton H. Bland, Dale K. Dedrick |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Cartilage
Articular Models Anatomic Materials science Acoustics and Ultrasonics Radiological and Ultrasound Technology Cartilage Biophysics Osteoarthritis Surface finish Anatomy medicine.disease Cartilage surface Femoral head medicine.anatomical_structure Image Processing Computer-Assisted Quantitative assessment medicine Pressure amplitude Humans Hip Joint Radiology Nuclear Medicine and imaging Ultrasonography Biomedical engineering High frequency ultrasound |
| Zdroj: | Ultrasound in Medicine & Biology. 18:51-58 |
| ISSN: | 0301-5629 |
| DOI: | 10.1016/0301-5629(92)90008-x |
| Popis: | Osteoarthritis (OA) is a common disease which affects nearly 50% of people over age 60. Histologic evaluation suggests that fibrillations approximately 20-150 microns are among the earliest changes in the articular cartilage. We propose a technique to quantify these surface fibrillatory changes in osteoarthritic articular cartilage by considering the angular distribution of the envelope-detected backscattered pressure field from an incident 30-MHz focused transducer. The angular distribution of the scattered acoustic field from an inosonifying source will directly relate to the distribution of surface fibrillatory changes. Data are presented for three different grades (400, 500 and 600 grit) of commercially available emory paper and three samples of osteoarthritic femoral head articular cartilage, which were visually assessed as having smooth, intermediate and rough surfaces, respectively. Our preliminary results indicate a probable monotonic relationship between articular cartilage roughening and the degree of broadening in the angle-dependent pressure amplitude. When applied to the emory paper, the technique indicates sensitivity to differences as small as approximately 5-10 microns in mean roughness. This procedure may provide an extremely sensitive and reproducible means of quantifying and following the cartilage changes observed in early osteoarthritis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|