Application of reconstruction technique in the CT scan of nasal traumas
10.3969/j.issn.1671-8348.2015.28.020
- VernacularTitle:基于原始数据的迭代重建技术在鼻部外伤 CT 扫描中的应用
- Author:
Xianchun ZENG
;
Yan YANG
;
Dan HAN
;
Qian WANG
;
Shaolei KANG
- Publication Type:Journal Article
- Keywords:
nase;
trauma;
tomography,X-ray computed;
sinogram affirmed iterative reconstruction;
filtered back-projection
- From:
Chongqing Medicine
2015;(28):3956-3958
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of the SAFIRE reconstruction technique for the nasal traumatic lesions .Methods Six‐ty‐seven patients with nasal traumas were scanned by the orbital scan and were reconstructed with FBP and SAFIRE (strength grade 1 to 5) respectively .Then a comparative analysis for six kinds of reconstructed images were conducted on the average CT value ,noise ,signal to noise ratio (SNR) ,contrast to noise ratio (CNR) ,subjective scoring and lesion detection .Results Compared with reconstruction by FBP , SAFIRE (strength grade 1 to 5)reconstruction ,for the noise ,decreased to 20 .4% ,31 .4% ,39 .7% ,46 .5% and 57 .2% respectively ;For the SNR ,increased to 33 .3% ,54 .7% ,75 .4% ,87 .4% and 101 .4% respectively ;For the CNR ,it also increased to 23 .0% ,36 .4% ,57 .7% , 87 .4% and 106 .5% respectively ;The difference was statistically significant (P< 0 .05) .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 and SAFIRE‐4 ,the image subjective scoring was 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 CT scan combined SAFIRE reconstruction technique can decrease effectively the noise and increase the image quality in the traumatic nasal scan , as well as has a potential effect to decrease the scan dose .
