Given Imaging Ltd., which is based in Israel, has developed a diagnostic tool called the PillCam that is used in gastrointestinal imaging of the small intestine. Traditionally, direct examination of the gastrointestinal tract has required either endoscopy or surgery. The PillCam promises to eliminate the discomfort experienced by patients who would have otherwise undergone endoscopy. An endoscope is a bulky apparatus with a camera that patients must swallow in order for physicians to directly visualize the digestive tract. In contrast, the PillCam is a small capsule that contains a miniaturized camera. It is much easier for the patient to swallow the PillCam than a traditional endoscope. It measures 26.4 millimeters in length and 11.3 millimeters in width, about the same size of a megavitamin. The two-piece plastic capsule contains a number of electronic components, including six tiny LEDs for illumination of the lens, a Photobit (now Micron Imaging) CMOS color image sensor that provides a resolution of 256-by-256 pixels, two Eveready button-type watch batteries made out of silver oxide, a plastic lens, a transmitter, and a controller. There are a total of five layers within the PillCam: a lens and illumination layer, switch layer, imager layer, battery layer, and transmitter layer. The PillCam boasts a feature resolution within the gastrointestinal tract of 0.1 millimeters, along with a viewing angle of 140 degrees.