Impact study of iterative reconstruction algorithm-based iDream reconstruction technique on CT quantitative analysis of lung functional
10.19745/j.1003-8868.2024174
- VernacularTitle:基于迭代重建算法的iDream重建技术对CT定量分析肺功能的影响研究
- Author:
Li MA
1
;
Fu-Ling ZHENG
;
Shu-Min LYU
;
Song SHAO
;
Chao LI
;
Xiu-Qing WANG
;
Yan-Li GUO
;
Man WANG
Author Information
1. 解放军总医院京南医疗区医学影像科,北京 100071
- Keywords:
iDream reconstruction technique;
iterative reconstruction algorithm;
CT quantitative analysis;
fittered bacd pro-jection;
lung function;
emphysema
- From:
Chinese Medical Equipment Journal
2024;45(9):57-61
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the impacts of different levels(1,3 and 5)of iDream reconstruction on CT quantitative analysis of lung function parameters,providing references for quantitative measurement of emphysema indicators by iDream reconstruction technology.Methods A retrospective study was performed for 50 patients who underwent noncontrast chest CT scan in some hospital from December 2021 to January 2022,and the images were reconstructed using four methods:fittered back projection(FBP)and level 1,3 and 5 iDream techniques.For the four groups of images,the main tracheal CT values and standard deviation(SD)values were measured,the signal to noise ratio(SNR)was calculated and the total lung volume(TLV),emphysema volume(EV),emphysema index(EI),15th percentile of lung attenuation(Perc 15)and pulmonary density 15％(PD15％)were detected with quantitative lung function analysis software.Statistical analysis was performed using SPSS 24.0 software.Results The four groups did not have significant differences in the main tracheal CT value and TLV(P＞0.05),while did in SD,SNR,EV,EI,PD15％and Perc 15(P＜0.05).As the reconstruction level of iDream increased,the main tracheal SD value,EV and EI decreased gradually,and level 3 and 5 iDream reconstruction groups had no significant differences in EV and El(P＞0.05);as the reconstruction level of iDream increased,PD15％and Perc 15 rose gradually,and level 3 and 5 iDream reconstruction groups had no significant differences in PD15％and Perc 15(P＞0.05).Conclusion Increase of the level of iDream reconstruction algorithm affects the results of CT quantitative analysis of lung function by reducing image noise.Level 3 and 5 iDream reconstruction ensures the stability of EV,EI,PD15％and Perc 15,which are not influenced by the strength of the iterative reconstruction algorithm.[Chinese Medical Equipment Journal,2024,45(9):57-61]
