Comparing the Diagnostic Role of PET/MRI and of PET/CT Among Patients With Gastric Cancer

Comparing the Diagnostic Role of 18F-FDG PET/MRI and of 18F-FDG PET/CT Among Patients With Gastric Cancer：A Randomized Controlled Trial

The results of PET/MRI and PET/CT in each recruited gastric cancer patients will be compared.

A prospective comparison of PET/MRI and PET/CT for gastric cancer will be performed,to evaluate the value of PET/MRI in predicting the preoperative staging and resectability of gastric cancer and investigate the role of PET/MRI in gastric cancer diagnosis.The evaluation parameters are the diagnostic accuracy of gastric cancer staging( including the overall accuracy, sensitivity, and specificity) and the receiver operating characteristic (ROC).

Inclusion Criteria:

1. Histological diagnosis of gastric cancer
2. No previous treatment history for gastric cancer
3. Without complications of obstruction,bleeding and so on
4. Without severe diabetes,the levels of blood glucose <6.2 mmol/L .
5. No cardiac pacemarker,never stimulator or other metal substitute materials in vivo.

Exclusion Criteria:

1. With other neoplastic disease.
2. Suffering acute inflammatory disease
3. History of chemo-radiotherapy
4. Suffering prostate hyperplasia,glaucoma