The results of our analysis suggest that PET/CT is a useful tool for detecting malignant pulmonary nodules qualitatively. Although current evidence showed moderate accuracy for PET/CT in differentiating malignant from benign solitary pulmonary nodules, further work needs to be carried out to improve its reliability.

Pure-phase α-MnO2 and δ-MnO2 nanorods were synthesized through an easy solution-based hydrothermal method. Platinum nanoparticles supported by the obtained MnO2 nanorods were prepared by the colloid deposition process. The microstructure and adsorption activity of the obtained catalysts were researched by different techniques such as transmission electron microscopy (TEM), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption measurements, and H2 temperature-programmed reduction (H2-TPR). The cataluminescence (CTL) properties of CO and volatile organic compounds (VOCs), such as benzene and toluene, on the resultant catalysts were explored. The results showed that the platinum nanoparticles were well distributed in α-MnO2 and δ-MnO2. In addition, the Pt load process does not affect the crystal phase structure of the α-MnO2 nanorods, but can generate structural changes in the δ-MnO2 nanorods. The phase transformation did not the result of the reaction between the δ-MnO2 nanorods and Pt as shown in the XPS study. The α-MnO2 and δ-MnO2 nanorods showed a high catalytic oxidative activity toward CO, benzene, and toluene, and δ-MnO2 showed a higher activity than the α-MnO2 phase. Although, the Pt load led to a

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