As with SPECT imaging, PET scan data can be reconstructed and displayed as a three-dimensional image. These algorithms compute an estimate of the likely distribution of annihilation events that led to the measured data, based on statistical principles. The result is that structures deep in the body are reconstructed as having falsely low tracer uptake. As a precaution, you may be advised to avoid close contact with pregnant women, babies and young children for a few hours after having a PET scan.
Positron Emission Tomography - Mathematics and Physics of Positron Emission Tomography - Mathematics and Physics of
A PET scan can give an idea of how well chemotherapy is working, and it can detect a recurring tumor sooner than other techniques.
CT imaging uses special x-ray equipment, and in some cases a contrast material, to produce multiple images of the inside of the body.
It is also possible that some hospital inpatients may undergo a PET examination for certain conditions. The energy resolution depends on the light output and the intrinsic energy resolution of the crystal. This algorithm has the advantage of being simple while having a low requirement for computing resources.General principle of positron emission tomography imaging: decay of radionuclide, positron (β +) emission, multiple scatter in tissue, annihilation with electron, and production of two back-to-back 511 keV annihilation photons. The gamma camera system can complete a scan more quickly, and at less cost, than a traditional PET scan. The costs for specific medical imaging tests, treatments and procedures may vary by geographic region.
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