| Autor: |
Keisuke YAMADA, Kohei ODA, Naohide TOMITA |
| Jazyk: |
angličtina |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Journal of Biomechanical Science and Engineering, Vol 5, Iss 5, Pp 615-624 (2010) |
| Druh dokumentu: |
article |
| ISSN: |
1880-9863 |
| DOI: |
10.1299/jbse.5.615 |
| Popis: |
Background. Ultrasound evaluation of articular cartilage is not accurate if the ultrasound probe is not perpendicular to the cartilage surface. However a probe angle adjustment is difficult because of the manual procedure and the lack of angle index for the measurer. The aim of this study is to propose “Rise-to-Peak time” as an index of probe angle and to evaluate its effectiveness in evaluating articular cartilage surfaces. Methods. The “Rise-to-Peak time” is defined as the time interval between the rise of the first peak (50% amplitude of the first peak) and the first positive peak following the minimum peak of the echo. The relationship between the Rise-to-Peak time and probe angle was evaluated using several reflection surfaces including that of articular cartilage. Findings. The “Rise-to-Peak time” increased monotonically with increases in the angle between the probe and the reflection surface, and showed good agreement with calculated values for small angle changes ( |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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