18F-fluorodeoxyglucose positron emission tomography/computed tomography comparison of gastric lymphoma and gastric carcinoma

Figure 1 Comparison of gastric lymphoma and gastric carcinoma with diffuse fluorodeoxyglucose uptake. A-C: PET (left column), CT (middle column) and PET/CT fused images (right column) of a 74-year-old man with DLBCL (SUVmax 24.5, THKmax 4.3 cm); D-F: A 64-year-old woman with poorly differentiated gastric adenocarcinoma (SUVmax 28.2, THKmax 2.4 cm). CT: Computed tomography; PET: Positron emission tomography; SUVmax: Maximal standard uptake value; THKmax: Maximal thickness.

Figure 2 Comparison of gastric lymphoma and gastric carcinoma with segmental fluorodeoxyglucose uptake. A-C: PET (left column), CT (middle column) and PET/CT fused images (right column) of a 58-year-old woman with DLBCL (SUVmax 27.4, THKmax 1.9 cm); D-F: A 69-year-old woman with gastric tubular adenocarcinoma (SUVmax 17.1, THKmax 1.0 cm). CT: Computed tomography; PET: Positron emission tomography; SUVmax: Maximal standard uptake value; THKmax: Maximal thickness.

Figure 3 Comparison of gastric lymphoma and gastric carcinoma with local fluorodeoxyglucose uptake. A-C: PET (left column), CT (middle column) and PET/CT fused images (right column) of a 54-year-old woman with DLBCL (SUVmax 13.4, THKmax 2.0 cm); D-F: A 60 year-old man with poorly differentiated gastric adenocarcinoma (SUVmax 9.1, THKmax 1.9 cm) CT: Computed tomography; PET: Positron emission tomography; SUVmax: Maximal standard uptake value; THKmax: Maximal thickness.

Figure 4 Comparative receiver-operating characteristic curves of SUVmax and SUVmax/THKmax for differential diagnosis between gastric lymphoma and gastric carcinoma. ROC: Receiver-operating characteristic; SUVmax: Maximal standard uptake value; THKmax: Maximal thickness.