an implement consisting of a broad blade or scoop attached to a long handle, used for taking up, removing, or throwing loose matter, as earth, snow, or coal. 2. any fairly large contrivance or machine with a broad blade or scoop for taking up or removing loose matter: a steam shovel. 3. a shovelful.
Advanced Cone Beam CT Technology. CBCT scanners, on the other hand, are based on volumetric tomography, using a 2D extended digital array providing an area detector. This is combined with a 3D x-ray beam (Fig. 1b). The cone-beam technique involves a single 360Â° scan in which the x-ray source and a reciprocating area detector synchronously move around the patientâs head, which is stabilized with a head holder. At certain degree intervals, single projection images, known as âbasisâ images, are acquired.
Medical Definition of Cone. Cone: A type of specialized light-sensitive cell (photoreceptor) in the retina of the eye that provides color vision and sharp central vision. By contrast, the rods are the retinal photoreceptors that provide side vision and the ability to see objects in dim light (night vision). Search MedTerms: