Abstract
When an operation of epilepsy to remove an epileptic focus, electroencephalogram (EEG) recordings by using disc electrodes placed on the brain surface are usually performed. It is important to compare a number of measurement results of the brain functions for reliability improvement. Based on such backgrounds, we propose and develop a multi-functional CMOS image sensor device for imaging of brain activities by an adoption of an optical imaging method which is one of the in vivo recording methods. In this report, we describe the design details and characterization of the sensors.
