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Endoscopic capsules, ingestible pill-shaped devices designed to
capture images from inside the digestive tract, have been around
for quite a while.
But Sayaka, an endoscopic capsule developed by RF System Lab
in December 2005, has dramatically increased the overall image
quality by changing the camera position and enabling the camera
While conventional capsules, including RF System Lab’s own Norika,
typically have cameras at one end of the capsule, Sayaka’s camera
has been moved to the side, where it has a better view of the intes-
In addition, a tiny stepper motor rotates the camera as the capsule
passes through the digestive tract, allowing Sayaka to capture
images from every angle.
Like Norika, Sayaka’s power is supplied wirelessly from an external
source, primarily so that no harmful battery substances get into