Diagnosis And The Sensitivity Of ¹⁸F-FDG PET/CT And WB-DWI For Rectal Cancer

Objective Discuss the diagnosis of pathological differentiation and sensitivity of staging to rectal cancer by indicators of SUV value of positron emission tomography / computed tomography(PET/CT) and ADC value of whole body diffusion-weighted magnetic resonance imaging(WB-DWI).Methods Selected 30 cases of rectal adenocarcinoma(high-differentiation,10 cases; mid-differentiation, 10 cases; low-differentiation, 10 cases). They were underwent whole body 18F-FDG PET/CT and WB-DWI examination. The measured data were compared with the final results and postoperative pathology staging results. We analyzed the relationship between these two inspection method and diagnosis of pathological differentiation and tumor staging for rectal cancer.Results the SUV value of PET/CT check-up indexes was elevated in proper order from high-to low-differentiation, but the ADC value of that became lower trend, and r SUV value was negatively related to r ADC value. Tumor staging with SUV values >2.5 and ADC values of <1.0×10-3mm2/s to differentiate between benign and malignant lymph nodes, the staging results and pathological staging results are well agree with. Conclusion Results show that above the integration check-up can provide the reference for diagnosing pathological differentiation degree of rectal adenocarcinoma and tumor staging, therefore, it could be a better preoperative examination method.