| Cone Beam Reconstruction |
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Information AboutCone Beam Reconstruction |
Cone beam reconstruction uses a 2 Dimensional approach of using a normal black and white camera that is coated with a Scintillator which converts x-rays to visible light. An x-ray source, normally electronic generated, is sending x-rays towards a target sample which creates shadow images on the Scintillator . Depending on the scanner type, either the target sample is rotated or the camera – (x-rays) source systems is rotated. The reason why it is called cone-beam reconstruction is that the x-rays are sent in a cone shape. The images taken are called Projection Images or are also known as Shadow Images . The more x-rays-dense the object is the less x-rays will hit the scintillator and the less light it produces. So the camera sees a dark point. This way we know the density of this object according to this line of sight from the projected point towards the x-rays source point. By taking multiple Projection Images around the rotation axis of the sample, we can reconstruct the Cross Section of that object. Unlike Fan Beam reconstruction, we have a lot of mathematics to reconstruct one cross-section so we need a lot of processing power of the computer(s) that does this. |
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