Video scope is an inspection tool, which capture images from inside holes, bores or cavities. They are combination bundles of optical devices and light sources that can be used in normally inaccessible locations.  Images are displayed in real time, recorded onto tape, and/or stored digitally. It resembles fiberscopes in appearance and operation.  However, instead of deriving a fiber optic image from a bundle in the probe, video scopes use a charged couple device in the distal tip to capture the image and transmit it back as electronic pulses. These are used in medical fields, including cardiology, dentistry, and reproductive analysis. These are often used for visual inspection of the internal surfaces, or inner diameter of tubes, piping, cylinders and castings, and for examination of engines and structures, and quality assurance testing.