99mTc-CNDG SPECT/CT in Brain Tumors

Inclusion Criteria: * Patients with clinical diagnosis of brain tumor; * Be at least 18 years old; * The final pathological results could be obtained by surgery or biopsy; * Informed consent and the ability to be followed up; * Those who did not meet the exclusion criteria. Exclusion Criteria: * Insulin-dependent diabetes mellitus or fasting blood glucose \>7 mmol/L before 99mTc-CNDG injection; * Severe liver or kidney disease (serum creatinine level \>3.0mg/dL or any liver enzyme level ≥ 5 times the upper limit of normal); * Severe hypersensitivity or hypersensitivity to radiocontrast agents; * Claustrophobia (inability to undergo SPECT/CT or PET/CT scans); * Patients receiving radiotherapy and chemotherapy; * Being pregnant or breastfeeding.