Nuclide Imaging: Planar Scintigraphy, SPECT, PET - Polytechnic ...
Nuclide Imaging: Planar Scintigraphy, SPECT, PET - Polytechnic ...
Nuclide Imaging: Planar Scintigraphy, SPECT, PET - Polytechnic ...
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Collimator ResolutionRc(z)2* Rc(z) is the maximum widththat a point source at distance zcan reach w/o being absorbedby the collimator.A single photon at distance zproduces a circle with radius=Rc(z) in the detector planezRc(z) equal to FWHM of the PSFof the detectorNote that this resolution isdependent on z: targets fartheraway are blurred more.Increase l can reduce Rc andhence increase the resolution,but also reduces sensitivityEL5823 Nuclear <strong>Imaging</strong> Yao Wang, <strong>Polytechnic</strong> U., Brooklyn 59