Study on the application value of dual source computed tomography with low tube voltage in enhancement scanning in epigastric region

doi:10.3969/j.issn.1002-7386.2014.03.006

Abstract：Objective To investigate the application value of dual source computed tomography (DSCT) with low tube voltage in enhancement scanning in epigastric region .Methods Forty patients (22 males & 18 females) underwent contrast-enhanced abdominal DSCT .The obtained data were reconstructed as three groups:group A,fused image reconstructed with D30 ( filter back projection FBP) ;group B,80kV image reconstructed with D30 and group C,80kV image reconstructed with I30 (iterative reconstruction IR).The mean CT numbers,noise and SNR of abdominal organs were assessed quantitatively and qualitatively in each group .The image quality was scored in three groups .Results There was no significant difference in noise between group A and group C ( P >0.05),however,which in both groups was obviously higher than that in group B (P <0.05).There was no significant difference in CT average value in main portal vein ,aorta and spleen between group B and group C ( P >0.05),however,which in both groups was significantly higher than that in group A ( P <0.05).There was no significant difference in SNR in main portal vein ,aorta and spleen between group A and group B ( P >0.05),however, which in both groups was significantly lower than that in group C ( P <0.05).There was no significant difference in CT average value in liver and pancreas among three groups ( P >0.05).There was no significant difference in SNR between group A and group C ( P >0.05),however,which in both groups was significantly higher than that in group B ( P <0.05). The image satiation diagnostic rate in group A and group C was 100%,which was significantly higher than that in group B (P <0.05).Conclusion The iterative reconstruction method with 80kV tube voltage can obtain satisfactory enhancement scanning image in epigastric region.