Different image pattern between the Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) after pair annihilation with the graphene
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There is some fundamental physics behind medical imaging as a mathematical expression, particularly how pair annihilation (from positrons and electrons) is central to PET scans but not to SPECT scans. Graphene could amplify or distort PET signals due to positron-electron interactions. It might slightly attenuate SPECT signals, but without electron annihilation, the effect is more about photon transport.
