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The NORIKA Project Team is the development group responsible for the battery-free micro capsule endoscope. RF SYSTEM lab's specialization is the integration of microwave and charge coupled device (CCD) camera technologies. The NORIKA system is powered wirelessly from outside the body, and totally eliminates the risks involved with toxic substances coming from batteries entering the human body. This system can work on continuous stable power supply and guarantee longer durational usage than is possible with batteries. Concerning image reproduction and brightness, the CCD sensor is a primary choice as an image-capturing device, but its power consumption is quite high. To circumvent this, the digital signal processor (DSP), which consumes most of the total power, is separated from the CCD sensor and is placed outside the human body. The camera's focusing feature and the intensity of independently controlled four LED lamps enables clear images to be monitored even in the darkness inside the body. Capsule rotation can also be accomplished for detailed examination. This rotation mechanism combines 3-pole motor theory with strobe light technology. The external unit to transmit data and power includes a coil-embedded vest and a joystick-type controller. The NORIKA system could be an optional diagnostic tool in the near future.
Uehara et al. (Wed,) studied this question.