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- Reconstruct tomographic slice
using many projections
- Usually, projections are taken
every 3 or 6 degrees
- Need to cover at least 180
degrees to enable reconstruction
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- No depth information is kept on a planar image
- The information of a planar image is an integral (sum) across the direction perpendicular to the pixel imaged. The sum is across all depths
- Tomography generate slices, where planar information of several angles is used to reconstruct the data across the depth
- It has the advantage that the data is separated for different depths as well
- This method is called SPECT (Single Photon Emission Tomography)
- Most modern applications were developed on the basis of SPECT
- Eventually the "slices" can be used to build a 3-dimensional image of the distribution of the radioisotope in in the patient. This 3-d image can then be "sliced" in any direction
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Thank you to Dr. Jonathan Links for being a partner in the creation
of the "Intro to Nuclear Medicine" presentation.
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Tool Box |
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