Purpose: To evaluate a novel spine implant. carbon-fiber-reinforced polyetheretherketone (CFR-PEEK). for proton and photon treatment planning. Materials and Methods: We compared target coverage and sparing of organs-at-risk (OARs) for a spinal phantom with 4 different spine configurations: (a) normal (no implant); (b) Titanium; (c) CFR-PEEK; and (d) hybrid (CFR-PEEK with Titanium tuli... https://parisnaturalfoodes.shop/product-category/reishi/