Virtual-Pinhole PET From: The Journal of Nuclear Medicine | Date: March 1, 2008| Author: | Copyright Society of Nuclear Medicine Mar 2008. Provided by ProQuest LLC.Copyright information

We proposed and tested a novel geometry for PET system design analogous to pinhole SPECT called the virtual-pinhole PET (VP-PET) geometry to determine whether it could provide high-resolution images. Methods: We analyzed the effects of photon acolinearity and detector sizes on system resolution and extended the empiric formula for reconstructed image resolution of conventional PET proposed earlier to predict the resolutions of VP-PET. To measure the system resolution of VP-PET, we recorded coincidence events as a ^sup 22^Na point source was stepped across the coincidence line of response ...

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