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Abstract #1687

Detective Ability of pH in Osteosarcoma Microenvironment Using Chemical Exchange Saturation Transfer(CEST) Imaging

ZhengJia Zhang1, Lulu Zhao1, Xin Zhou1, Xiaomin Li1, Zhiwei Shen2, Shan Huang3, Xiance Zhao3, and Songtao Ai1
1Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China, 2Philips healthcare, Beijing, China, 3Philips Healthcare, Shanghai, China

Synopsis

Keywords: Other Musculoskeletal, Tumor, CEST

Motivation: The precise assessment of the efficacy of preoperative neoadjuvant chemotherapy in osteosarcoma is important for clinical decision making, which requires the consideration of complex factors.

Goal(s): In this study, we investigated the ability of ioversol chemical exchange saturation transfer (CEST) imaging in detecting pH in the microenvironment of rat osteosarcoma.

Approach: Assessing pH in the microenvironment of osteosarcoma using CEST imaging.

Results: It was found that the lower pH value, the lower ratiometric value acquired by two different saturation power of 1μT and 3μT.

Impact: In addition, CEST can detect the pH-dependent ratiometric value of tumor microenvironment non-invasively and sensitively. It is expected to become one of the methods for early evaluation of the effect of preoperative neoadjuvant chemotherapy in cancer patients.

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