This document provides a listing of the frequently asked questions about Sayaka.
The current endoscopic capsules on the market all have the lens installed at either end of the capsule. There are a number of weak points with this current design. Since the capsule can only capture images within its field of view, full gastrointestinal viewing is near impossible. The following example helps to explain,
The newly announced Sayaka has a lens on the lateral surface of the capsule instead of the front. This new design obtains clear-cut lateral images of the gastrointestinal wall while the inner capsule spins in the digestive tract. Therefore, the advantage of this lateral macro photography are clear-cut and high resolution images despite a low light environment. These images are recorded in 2 MB/mm2 pixel resolution which allows up to around 75-fold enhancement on a 17-inch monitor.
Sayaka is characterized by a double-structured cupsule made up of an outer and an inner capsule. Whereas the outer capsule traverses through the gastrointestinal tract, the inner capsule alone spins. This spinning is derived by Sayaka's small permanent magnet and an electromagnet which causes "stepping rotation".
Some motors only run when receiving pulsed signals resulting in a constant starting and stopping of the motor which causes the "stepping rotation". The rotation angle, also referred to as stepping angle, is proportional to the given pulsed signals. Sayaka is designed to have a stepping angle of 7.5 degrees. This stepping rotation is necessary in order to prevent fluctuation or blurring in the images. In Sayaka's promotion video, images are provided in synchronization with strobe light flashes.
Over an 8-hour period procedure, Sayaka will generate approximately 870,000 images of the whole digestive tract at a rate of 30 frames per second.
This is a process by which the final image which the doctor sees on the computer display is made by combining multiple images taken from various angles. This technology is well established and information can be found on numerous Websites. Mosaicing technology was developed for use with NORIKA 3 and has subsequently been improved for use with Sayaka.
YES. An integrated image is made up of 30 freeze-frame pictures, each of which is stored with an assigned address. Each single address can be viewed as an animated set.
NO. Sayaka's current technology is developed for the sole purpose of conducting a complete endoscopy within the small and large intestines.
Jiro Maruyama, the president and CEO of RF System lab., presented an paper academic lecture entitled "The Future of the Capsule Endoscope" to the Japanese Society of Applied Physics on 10th December 2005, at Shinsyu University, Faculty of Engineering.
This press release is intended to introduce our technology. All company names, brand names, product names, and the names of technologies on this press release are trademarks or registered trademarks of their respective companies.
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