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Custom-made 4D positron emission tomography (PET) insert for the Modus Medical QUASAR TM Programmable Phantom. (A) Modus Phantom and custom-made fillable spherical insert with a separator plate to create a third “muscle/blood' surrogate compartment (dashed rectangle in panel C). (B) Photo of 3-section insert (lung, tumor, and surrogate), (C) a corresponding computed tomography (CT) image, and (D) the fused PET-CT image of a static scan and one in motion without gating (E).
