%0 Journal Article %T A model System for Validation of PET Radiopharmaceuticals: Focusing on Tumor Microenvironment %A Xiao-Feng Li %A Huijie Jiang %A Yuanyuan Ma %A Tao Huang %A Xindao Yin %A A. Cahid Civelek %A Baozhong Shen %J International Journal of Medical Physics,Clinical Engineering and Radiation Oncology %P 19-29 %@ 2168-5444 %D 2013 %I Scientific Research Publishing %R 10.4236/ijmpcero.2013.21004 %X

Positron emission tomography (PET) imaging has emerged as an important clinical tool for cancer management, and specifically targeted radiopharmaceuticals play critical roles on PET molecular imaging. Solid cancers have highly complex and heterogeneous microenvironment, this review focused on those microenvironmental factors such as hypoxia, proliferation and perfusion and, accordingly, a novel test system for validation of current and novel targeted imaging radiopharmaceuticals. In this review, we have introduced the establishment of cancer and metastases models in nude mice, visualization of microenvironmental components of hypoxia, proliferation, perfusion, stroma and necrosis in cancers and metastases for establishing the microenvironment based model system, and validation of several radio- pharmaceuticals such as 18F-fluoro-2-deoxyglucose (18F-FDG) 18F-fluorothymidine (18F-FLT), 18F-misonidazole (18F- FMISO) using the system. We found that 18F-FLT accumulates in proliferating %K < %K sup> %K 18< %K /sup> %K F-Fluoro-2-Deoxyglucose %K < %K sup> %K 18< %K /sup> %K F-Fluorothymidine %K < %K sup> %K 18< %K /sup> %K F-Misonidazole %K Microenvironment %K Hypoxia %K Proliferation %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=28049