Perfusion CT of Stomach:Initial Experiences

Objective:To discuss the feasibility of Perfusion CT of stomach using a 16-detector CT scanner and to assess the value of Perfusion CT in the diagnosis of gastric tumors.Methods:6 volunteers without gastric diseases and 10 patients with suspected gastric tumors underwent 16-detector Perfusion CT scan.We performed perfusion CT post-processing using pancreatic mode of Perfusion CT software.Multiple regions of interest (ROI) were selected according to stomach wall thickness on the basic images.Blood flow (BF),blood volume (BV),mean transit time (MTT),and permeability surface (PS) of gastric wall were computed for every case.Results:BF,BV,MTT,and PS of gastric wall for volunteers were (13.51±5.34)ml/min·100g,(3.31±1.55)ml/100g,(10.40±2.70)s,(3.70±2.86)ml/min·100g;for gastric tumors were (97.32±71.04)ml/min·100g,(7.80±2.98)ml/100g,(10.17±3.35)s,(14.80±5.44)ml/min·100g respectively.The P values for perfusion CT parameters between gastric tumors and normal gastric wall were 0.003,0.001,0.856,0.001,respectively.Conclusion:Perfusion CT can provide hemodynamics of gastric tumors,thus playing a role in the diagnosis of gastric tumors.