The application value of iterative reconstruction SAFIRE technique in liver CT / 实用放射学杂志

ABSTRACT

Objective To study the value of SAFIRE reconstruction technique in the liver plain CT scan by the comparison of dis-plays to the liver separately by SAFIRE and traditional FBP reconstructions after DSCT scan.Methods 48 patients clinically doub-ted to have hepatic lesions were scanned by DSCT in liver,then the average CT value,noise,signal to noise ratio (SNR),contrast to noise ratio (CNR)and subjective scoring on image quality were compared after FBP and SAFIRE 1-5 reconstructions.Results There was no statistical difference on the average CT value of liver parenchyma in all 6 groups (P >0.05).The differences were sta-tistically significant (P <0.05)on noise,SNR,CNR and subjective scoring.SAFIRE 5 reconstruction had the least noise and the largest SNR and CNR.For the images of SAFIRE 1 and SAFIRE 5,the image subjective scoring was lower than that by FBP;for the images of SAFIRE 2-4,the image subjective scoring is higher than that by FBP;and SAFIRE 3 had the highest score.But for the rate of lesion detection,all the images were the same.Conclusion SAFIRE reconstruction strength 3 could produce the idealest image quality.SAFIRE reconstruction can decrease noise and improve SNR and CNR,and have a potential effect on decreasing the scan dose.