Industrial Tomography using X or gamma rays
What is Industrial Tomography ?
Industrial Tomography is analogous to medical tomography (Computer Tomograph for body scanning)
but, because of the high attenuation of X and gamma rays in metals, the energy range used is
higher and the collimators and detection system are, in some application, different.
Using the principle of radiation attenuation measurements along many directions (rays)
passing through the investigated object and followed by the use of special mathematical
reconstruction algorithm, the Industrial Tomograph is able to show the inside of the scanned
object in two (2D) or in three (3D) dimensions.
The information obtained, respectively the tomograms, are usually a pixels' map of the
attenuation coefficient (or density) values of the scanned slices or a projection of the
viewed voxels of the 3D matrix of the object.
The main parts of the Industrial Tomograph, in a very large number of types of items combination,
depending on application and the budget, are : the gamma or X ray radiation source, one or
several radiation detectors usually placed under collimators and around the boundary
of the scanned zone, a mechanical multi-axes digital scanner and the appropriate data
acquisition and monitoring hardware including the dedicated software packages.
The simplest scheme of an industrial tomograph
The tomographic investigation offers :
- Distance, surface, volume and local density measurements in any direction at any point
of the 2D and 3D tomogram;
- Drawing of 2D tomograms representing the map of pixel densities;
- Differently coloured materials drawing by using a colour plot based on histogram method;
- Drawing of 3D tomograms, representing the projection of the viewed voxels belonging to the
3D matrix filled with scanned object attenuation coefficients;
- Identification of constituent materials of the scanned object by using the "Dual energy
method" and a materials Data Base;
- 2D and 3D fully computerized Non-Destructive Testing of the scanned object.
Laboratory Stand for Tomographic Experiments
One radiation detector for various radiation types;
Radiation sources: 2 Ci 137Cs or X-Ray;
Reconstruction diameter : 100 mm;
Maximum object height : 100 mm;
Maximum object weight : 10 Kg;
2D and 3D tomographic scanning and reconstruction facility.
Family of Tomographs - TOMORAY XX
One or many radiation detectors, for various radiation types;
Radiation source: 20 Ci 192Ir;
Reconstruction diameter : 250 mm;
Maximum object height : 300 mm;
Maximum object weight : 25 Kg;
Resolution: 0.4 mm;
2D and 3D tomographic scanning and reconstruction facility.
- Standard 2D and 3D tomographic investigation for customer's objects;
- Preliminary tests and experiments with existing equipment about the opportunity of using
tomographic inspection for special customer's objects, regarding: resolution, identification
of flaws and cracks, limits of method, etc.
- General design of dedicated Tomographs, in any configuration related to detector type
and number, provided with gamma or X ray sources, many digital axes scanner and performing
special software analysis;
- Joint R&D for new Tomograph design.
- Welded pipe line Industrial Tomograph for in situ 3D non-destructive testing;
- Specialized Tomograph for analysing trees living in forest;
- Small speed-small cost Tomograph for Work of Arts and Archaeological Objects laboratory analysis;
- Dual energy method based Tomograph for the detection of bombs and explosive materials
placed in the luggage.
English || Românã
|| Lab. 57 || ICPE S.A.
Last updated : August 6, 1998
Laboratory Stand for Tomographic Experiments
Family of Tomographs - TOMORAY XX
One or many radiation detectors, for various radiation types;