Tom simulation
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Tom Simulation ----Based on CT Reconstruction Data Linlin Cong 2/21/2011
Transcript of Tom simulation
Tom Simulation ----Based on CT Reconstruction Data
Linlin Cong
2/21/2011
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Content
Introduction1
Detail of Procedure2
Preliminary Results3
Further work4
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What is Tomosynthesis simulation?
Using software to simulate the process of Tomosynthesisto get reconstructed images.
Why need to do this simulation?
To get ideal geometry of Tomosythesis regardless of physical limitations.
Help to optimize the design of Tomosynthesis devices in real.
Introduction
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Using CT images as an object
CT 3DObject
Information
ReconstructionImages
Get ProjectionImages
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Using CT images as an object
CT slices of an object
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CT 3DObject
Information
ReconstructionImages
ProjectionImages
Raytracing used to get attenuations of X-Ray
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Raytracing used to get attenuations of X-Ray
tubeTube path
CT slices
Detector
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tube
CT slices
Detector
A line of X-ray
Raytracing used to get attenuations of X-Ray
Get the value of x-rays detected by detector
Add up these X-ray attenuations
Calculate attenuation of each voxel=path length *
pixel value
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CT 3DObject
Information
ReconstructionImages
ProjectionImages
Filtered BackprojectionAlgorithm used to reconstruct
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Preliminary Results
I just pick up the 35th slice in CT slices and SimullatedTomosynthesis reconstruction slices as an example. In the above pictures, Tomo with this geometry can give a good result to restore the slices in an object. More effect should be taken to change the geometry and its parameters to test which one can give a much better results.
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Further work
Use multiple reconstruction algorithm.
Optimize the parameters of the simulated Tom geometry.
To gain a better reconstruction images.
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