RESUMO
Objective To investigate the microvessel density of stomach tumor and the relationship between the microvessel density and CT findings.Methods Conventional contrast-enhanced CT scans were performed in 64 patients with stomach tumor(OMNIPAQUE 100 ml,3.0 ml/s),the images at 45 s were gained.After operation,the specimens with partial normal stomach tissue were dealed with injecting the contrast medium through its feeding arteries(10 ml/100 g,within 30 min),then,the specimens underwent CT scan(delayed time 10 s and 20 s),the nets of blood vessel of the masses were reconstructed by post-processed.The density of masses was evaluated in comparison with the enhanced effect of masses before operation.The pathological examinations of specimens were done and the microvessel density of tumors were measured through immunohistochemical technique.The hemodynamic characteristics of tumors were analysed.Results In tumors,the highest density(D)increased with the tumor rank(beside dead band).The visive vessels of specimen were more than that on conventional contrast-enhanced CT,but the D/d(the highest density in the masses/the density in normal stomach tissue)was basically consistent.Conclusion For gastric carcinoma,the D/d ratio can reflect the microvessel density of the tumors on certainly and the hemodynamic characteristics of tumors.
