3 0 0 0 OA 生体信号計測用センサに求められる性能
- 著者
- 石山 陽事
- 出版者
- 一般社団法人日本医療機器学会
- 雑誌
- 医療機器学 (ISSN:18824978)
- 巻号頁・発行日
- vol.80, no.1, pp.21-27, 2010 (Released:2010-12-24)
- 参考文献数
- 7
2 0 0 0 OA 生体計測における雑音除去のノウハウ
- 著者
- 石山 陽事
- 出版者
- 一般社団法人 日本生体医工学会
- 雑誌
- BME (ISSN:09137556)
- 巻号頁・発行日
- vol.2, no.6, pp.401-407, 1988-06-10 (Released:2011-09-21)
- 参考文献数
- 6
多くのMEN器を使用する電磁環境下で, 生体計測中に混入する商用交流雑音をはじめ種々の雑音は計測の信頼性を損う要因となる. ここでは電源および機器相互の干渉などによって発生する雑音源について述べ, かつ具体的な雑音除去対策についても例をあげて解説する.
1 0 0 0 OA Source Derivation 法を用いた脳波局在部位推定に関する研究
- 著者
- 石山 陽事 白井 康之 野沢 胤美 関 要次郎 本間 伊佐子 江部 充
- 出版者
- 一般社団法人 日本生体医工学会
- 雑誌
- 医用電子と生体工学 (ISSN:00213292)
- 巻号頁・発行日
- vol.28, no.2, pp.113-121, 1990 (Released:2011-10-14)
- 参考文献数
- 12
This study presented the available effects of Source Derivation (SD) method for detecting the focal EEG, from the model experiments which were compared the traditional monopolar derivation with SD method, and also from the clinical recording for the patients, Signal dipole and EEG noise dipole embeded in a spherical volume conducted covered with three layer shells corresponding to neural tissue, skull and scalp, were used for the model. The following conclusions were obtained. 1) It was proved by the model experiment that SD method was useful for the detection of focal signal dipole potential on cortical surface. 2) SD method was useful to detect the signal not only in the cortical surface but also in the deep cortical area, when the reference electrode angle of SD method was smaller to the active electrode (α=10°-20°), that is, the distance of electrodes on scalp surface was about 1.6-3.2cm. 3) SD method was applied to the patients with focal spikes. The localization of the focal spike was more clear than the traditional ear reference monopolar recording. S/N to back ground EEG also was improved very well. 4) Identification of the location generated of primary responses in somatosensory evoked potential (SEP) by electrical stimulation of median nerve was tried by using the SD method with intererectrode distance of 2cm, and consequently the central sulcus and cortical primary sensory area were identified from the phase-reversal of SEP on the scalp.