The focus of this bachelor thesis was the application of an acoustic emission analysis within the area of physiotherapy. For this purpose, the BoneDiaS measurement system (Bone-Diagnostic-System) was performed, analyzed and compared to a self-assessment of patients, while they were performing three knee bends within ten seconds. The results of their performance were compared to a questionnaire where the patients had to state the soundness of their own knees. For the self-assessment of the patients, the KOOS questionnaire (Knee Injury and Osteoarthritis Outcome Score) was analyzed. A total number of 48 patients was measured on both of their knees with the BoneDiaS in combination with a foot pressure measurement system and frontal video recordings. Only signals of the BoneDiaS were analyzed here.
Of the 99 measurements (two of each patient, and three repetition measurements) three patients were diagnosed with friction, which could lead to future damages, also five with lesions, and five with osteoarthritic damages. The comparison of the self-evaluation of the patients with the results of the acoustic emission of their knees showed significant differences. Reason for this lies in the fact that BoneDiaS is a tool for early diagnosis of knee injuries and degree of damages were too small to be sensed.
This bachelor thesis lays the ground for future measurements within the area of physiotherapy. As a basis for potential thesis in the future, the measured group can be used as a reference to a group of diseased patients because a major number of measurements had shown either no findings or signals with no significant damages.