The value of third-generation dual-source CT low-pressure voltage combined with ADMIRE in children′s nasopharynx examination
10.3969/j.issn.1006-5725.2019.04.030
- VernacularTitle:第三代双源CT低管电压联合高级建模迭代重建在儿童腺样体检查中的价值
- Author:
Huiyou SHI
1
;
Hongyu LU
;
Xuelong CUI
;
Xiaoyong ZHANG
;
Xianchun ZENG
Author Information
1. 贵州省人民医院影像科
- Keywords:
third generation dual source CT;
low tube voltage;
ADMIRE;
nasopharynx;
radiation dose
- From:
The Journal of Practical Medicine
2019;35(4):641-644
- CountryChina
- Language:Chinese
-
Abstract:
Objective Exploration of the application value of the third-generation dual source CT low tube voltage (70 kVp) scanning combined with advanced modeling iterative reconstruction (ADMIRE) technique in children with adenoid examination. Methods CT scans were performed in patients with clinically suspected adenoid hypertrophy. They were divided into two groups according to the time of treatment. Group A (40 cases) : low tube voltage (70 kVp) scan, reference tube current 163 mAs, reconstruction with ADMIER, Intensity 3; Group B (40 cases) : conventional 100 kVp, reference tube current 163 mAs, conventional (filtered back-projection, FBP) reconstruction;rest of the scanning parameters remained unchanged. The subjective scores and objective quality indicators of the images (CT value, image noise, signal noise ratio (SNR) , contrast noise ratio (CNR)) and radiation dose of the two groups were compared. Results The difference of radiation dose between group A and group B was statistically significant (P < 0.05). The radiation dose of group A was lower than that of group B by 77.58％.Compared with group B, the image noise of group A increased by 0.002％; the SNR decreased by 0.01％; CNR increased by 0.03％; there was no significant difference in objective quality evaluation index and subjective score between two groups in the image quality (P> 0.05). Conclusion The third-generation dual-source CT low-tube voltage (70 kVp) combined with ADMIRE reconstruction technique for children with adenoid scan can effectively reduce the radiation dose while ensuring image quality.
