| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Auscultation of lung sounds using a stethoscope is one of the most popular and cost-effective medical examination methods for the identification of respiratory illnesses. This auscultation is based on the heuristic that abnormal respiratory sounds are frequently observed in patients with pulmonary emphysema. These abnormal sounds are termed adventitious sounds. However, frequent noise pollution such as heart sounds and the similarity between the spectral features of noises and of some adventitious sounds hindered the achievement of a high detection rate.
In this study, the difference in occurrence frequencies between two types of adventitious sounds for each considered auscultation point was considered. Furthermore, we devised a robust detection method for lung sounds contaminated with heart sounds. The key characteristic of the proposed method included the use of the validity score representing the misrecognition of heart sounds as adventitious sounds.
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