NDT & Metrology

Volume Rendering for 3D X-ray (Volume CT)

Volume rendering is a method of creating a 3D volumetric representation from 2D projection slices. For industrial CT scanning (volume CT), the projections are created by the 2D x-ray slices. The x-ray slices apply a grey scale value for the various density and thickness of a component. Basically a different grey scale value will be given if the path length of the x-ray  to penetrate is longer or shorter, in addition, the grey scale value will vary as the density of the material changes. Volume rendering in CT uses voxel representation. A voxel is a volume element, representing a value on a regular grid in three dimensional space, basically a 3D pixel. The 3D pixels become the building blocks for the volume rendering of the component. Within the use of various CT analysis software, the volume rendering can be manipulated to show section views and vary the densities to see the internal components. For more information, visit www.jgarantmc.com


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