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| Wenzel Volumetrik CT Scanners |
| What is CT and how does it work? |
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Computed Tomography (CT) is a
powerful none destructive evaluation (NDE) technique for
producing 2-D and 3-D cross-sectional images of an
object from flat X-ray images. Characteristics of the
internal structure of an object such as dimensions,
shape, internal defects, and density are readily
available from CT images. Shown below is a schematic of
a CT system. |
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The test component is placed on a
turntable stage that is between a radiation source and
an imaging system. The turntable and the imaging system
are connected to a computer so that x-ray images
collected can be correlated to the position of the test
component. The imaging system produces a 2-dimensional
shadowgraph image of the specimen just like a film
radiograph. Specialized computer software makes it
possible to produce cross-sectional images of the test
component as if it was being sliced.
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How a CT
System Works
The imaging system provides a shadowgraph of an
object, with the 3-D structure compressed onto a 2-D
plane. The density data along one horizontal line of the
image is uncompressed and stretched out over an area.
This information by itself is not very useful, but when
the test component is rotated and similar data for the
same linear slice is collected and overlaid, an image of
the cross-sectional density of the component begins to
develop. |
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| More to follow - Web Page Under Development |
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