Dual energy computer tomography(DECT)is a new energy CT imaging technology that provides a new approach for accurate preoperative diagnosis of gastric cancer.It has certain value in evaluating and judging T-stage,lymph node metastasis,vascular invasion,differentiation degree,therapeutic effect,and prognosis of gastric cancer by obtaining multiple quantitative parameters related to tissue composition:energy spectrum curve,energy spectrum curve slope(K),iodine concentration(IC),normalized iodine concentration(NIC),etc.,and is expected to become an important tool for accurate preoperative diagnosis of gastric cancer.
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