关键词: Force CT, 能谱, 下肢深静脉血栓, CT值

Abstract: Objective This study is to explore the relationship between blood components and thrombosis CT imaging of the(Deep vein thrombosis)DVT by Force CT spectrum,clarify the influence factors of thrombosis CT value,early evaluation on the study of thrombus stability.
Methods Analysis of 21 patients with suspected lower extremity deep venous thrombosis was conducted from Dec,2015 to Jan,2017.Scanning all the patients by SOMATOM Force CT after the injection of contrast agent in the elbow vein,recording vessel and thrombus shape,thrombus distribution and collateral vessels on CT enhanced image.Reconstructed the image and uploaded the data to the workstation.The 40-190Kev of Energy spectrum image can be obtained by energy spectrum analysis software.All the subjects were tested for hemoglobin,red blood cells and platelets.SPSS regression analysis was used to determine the relationship between the CT value of each single energy and the blood components.
Results According to the 40-190Kev,among red blood cell,hemoglobin and platelet,only hemoglobin has statistical relationship with blood CT values,only hemoglobin has a significant influence on the CT value of blood.The relationship between thrombosis CT spectrum curve of thrombus and blood components:through multiple stepwise regression analysis showed that regression equation between 40-190 Kev single energy thrombus CT and red blood cells,hemoglobin,platelet were no significant difference in all the regression equations(F=1.12~3.14,P>0.05),there was no obvious correlation between spectrum CT value of thrombus and red blood cells,hemoglobin,platelet.
Conclusion In normal blood,hemoglobin is the main factors influencing the CT value of blood,while red blood cells and platelets of blood CT value had no significant influence;there are no significant correlation between thrombosis and energy spectrum and CT value of blood red blood cells,hemoglobin,platelet.

Key words: Force CT, spectrum, deep vein thrombosis, CT attenuation