| Presentation | 2017-05-22 Distortion-Free AGC/ALC for Fetal Doppler Audio Signal Envelop Seiji Matsumoto, Manabu Koda, Yasuhito Takeuchi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Abstract: When applying an instantaneous AGC/ALC to fetal Doppler signal, the envelop distortion caused by rapid gain changing on attack process causes erroneous or uncertain heart rate measurement due to modified envelop of the signal. The syndrome can’t be solved only by adjusting its attack and/or decay time constant. In this study we try to use detoured/delayed signal AGC/ALC system where the delayed main channel gain is controlled by un-delayed sub channel AGC/ALC control parameter, in order not to distort envelop of heart beat signal. This method was found effective in experiment, however, in real signal a variety of other variation prevented its unanimous effectiveness. The project is left open for further study. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Doppler / Fetal Monitoring / AGC / ALC / Attack / Decay / Heart Rate Variability |
| Paper # | US2017-17 |
| Date of Issue | 2017-05-15 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2017/5/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) |
| Vice Chair | Nobuyuki Endo(Kanagawa Univ.) |
| Secretary | Nobuyuki Endo(Univ. of Toyama) |
| Assistant | Takenobu Tsuchiya(Kanagawa Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Distortion-Free AGC/ALC for Fetal Doppler Audio Signal Envelop |
| Sub Title (in English) | |
| Keyword(1) | Doppler |
| Keyword(2) | Fetal Monitoring |
| Keyword(3) | AGC |
| Keyword(4) | ALC |
| Keyword(5) | Attack |
| Keyword(6) | Decay |
| Keyword(7) | Heart Rate Variability |
| 1st Author's Name | Seiji Matsumoto |
| 1st Author's Affiliation | Asahikawa Medical University Hospital(Asahikawa Med. Univ. Hospital) |
| 2nd Author's Name | Manabu Koda |
| 2nd Author's Affiliation | Akibagaoka Laboratory(Akibagaoka Lab.) |
| 3rd Author's Name | Yasuhito Takeuchi |
| 3rd Author's Affiliation | Asahikawa Medical University(Asahikawa Med. Univ.) |
| Date | 2017-05-22 |
| Paper # | US2017-17 |
| Volume (vol) | vol.117 |
| Number (no) | US-41 |
| Page | pp.pp.19-21(US), |
| #Pages | 3 |
| Date of Issue | 2017-05-15 (US) |