| Автор | D S Holder |
| Дата выпуска | 1992-02-01 |
| dc.description | The performance of a prototype impedance imaging (electrical impedance tomography, EIT) system using cortical or scalp electrodes has been assessed in a model of global cerebral ischaemia in the anaesthetised rat. In preliminary calibration experiments using a circular array of electrodes around a tank of saline, the centre of a polythene rod could be localised with a mean error of 4% of the tank diameter, and two such rods could be discriminated when separated by 22% of the tank diameter. Cerebral ischaemia was produced by diathermy of the vertebral arteries and reversible occlusion of the common carotid arteries for 15 min. A bimodal impedance increase of about 50-200% was recorded with a ring of cortical electrodes in the fronto-occipital plane. With a similarly orientated ring of scalp electrodes, a unimodal impedance increase of about 10% was observed. In both cases, impedance reversed after cerebral reperfusion. Similar but irreversible changes were observed post mortem. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Electrical impedance tomography with cortical or scalp electrodes during global cerebral ischaemia in the anaesthetised rat |
| Тип | paper |
| DOI | 10.1088/0143-0815/13/1/008 |
| Print ISSN | 0143-0815 |
| Журнал | Clinical Physics and Physiological Measurement |
| Том | 13 |
| Первая страница | 87 |
| Последняя страница | 98 |
| Аффилиация | D S Holder; Dept. of Physiol., Univ. Coll., London, UK |
| Выпуск | 1 |
