What technology uses optic fibers for internal examination of the body?

The technology that uses optical fibers for internal examination of the body is endoscopy. In endoscopy, a flexible tube with a light and camera, known as an endoscope, is inserted into the body through natural openings or small incisions. The optical fibers allow for illuminating the internal structures and transmitting high-quality images to a monitor, enabling medical professionals to visually inspect organs, tissues, and other internal areas. This technique is minimally invasive, helping in both diagnostic and therapeutic procedures, and is widely used for examining the gastrointestinal tract, respiratory system, and more.

While technologies like ultrasound and radiology involve different methods of imaging, such as sound waves and X-rays, respectively, they do not utilize optical fibers for internal visualization. Fibre optics refers more broadly to the technology of transmitting light through fibers and is not exclusively related to medical examination. Hence, endoscopy is specifically designed for this purpose, making it the correct answer.