CTPA image quality analysis of different level iterative reconstruction with 80 kV in obese patients
10.13929/j.1672-8475.201611025
- VernacularTitle:肥胖患者80kV不同级别迭代重建技术CTPA图像质量分析
- Author:
Xiao SUN
;
Xingcang TIAN
;
Wenling LI
;
Kai SUN
;
Lisha MU
;
Li ZHU
- Keywords:
Tomography,X-ray computed;
Iterative reconstruction;
Noise;
Obesity;
Lower tube voltage
- From:
Chinese Journal of Interventional Imaging and Therapy
2017;14(5):306-309
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the effects of different level iterative reconstructions (IR) on image quality of obese patients of 80 kV CT pulmonary angiography (CTPA).Methods Forty obese patients with clinically suspected pulmonary embolism were examined with CTPA,filtered back projection method (FBP) and three IR levels (iDose1,20％ IR/80％ FBP;iDose3,40％ IR/60％ FBP;iDose5,60％ IR/40％ FBP) to reconstruct images were used.The CT value of pulmonary artery trunk,upper lobe artery and lower lobe basal segment artery of right pulmonary were measured,and the image noise,SNR and CNR of four groups were calculated and compared.Results The image noise,SNR and CNR had significant difference in 4 groups (all P＜0.05),and the image noise had significant difference between each two groups (all P＜0.05),the SNR and CNR had statistical difference between FBP and iDose3,between FBP and iDose5 (P＜0.01).Conclusion Compared with FBP,80 kV combined with different level IR technologies can significantly decrease image noise and improve objective image quality in CTPA,the radiation dose that obese patients received can be reduced.
