| He Bin,Guo Ying,Yang Ruijing,et al.Application of adaptive statistical iterative reconstruction in low dose temporal bone CT scan of children[J].Chinese Journal of Radiological Medicine and Protection,2016,36(7):544-547 |
| Application of adaptive statistical iterative reconstruction in low dose temporal bone CT scan of children |
| Received:February 04, 2016 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.07.014 |
| KeyWords:Children Temporal bone Radiation dose Evaluation research |
| FundProject: |
| Author Name | Affiliation | E-mail | | He Bin | Key Laboratory of Medical Imaging of Neurological Disease of Henan Province, Henan Provincial People's Hospetal, Zhengzhou 450003, China | | | Guo Ying | Key Laboratory of Medical Imaging of Neurological Disease of Henan Province, Henan Provincial People's Hospetal, Zhengzhou 450003, China | | | Yang Ruijing | Key Laboratory of Medical Imaging of Neurological Disease of Henan Province, Henan Provincial People's Hospetal, Zhengzhou 450003, China | | | Liu Hongming | Key Laboratory of Medical Imaging of Neurological Disease of Henan Province, Henan Provincial People's Hospetal, Zhengzhou 450003, China | | | Wang Pengcheng | Tai'an Taishan Medical University, Tai'an 271016, China | wpc163@163.com |
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| Abstract:: |
| Objective To evaluate clinical use of adaptive statistical iterative reconstruction (ASiR) method in low-dose scan on children temporal bone by comparison of radiation dose delivered by GE Discovert HD CT 750 scan and GE Lightspeed VCT64 scan.Method Sixty patients with congenital deafness were divided into two groups according to gender, age (each N=30).Group a received low-dose CT scan on temporal bone by GE Discovery HDCT 750 (preset NI=12), and the original images were reconstructed with ASiR (weighted value=40%). Group B received CT scan by GE Lightspeed VCT 64 (preset NI=8), and the original images were reconstructed with filter back projection (FBP). Data were collected and analysed using the SPSS 18.0 software. Resultes The mean value of electric current of average tube and CTDIvol were significantly different between group A and B [(110.40±21.72) mA vs. (168.56±24.36) mA, and (26.43±3.48) mGy vs. (39.66±4.17) mGy, respectively (t=-9.76,-3.31,P<0.05)]. The noise index was (33.13±2.68) in group A and (33.79±2.93) in group B respectively, and the results had no statistical significance (P > 0.05). Subjective scores of the images were (4.06±0.03) and (4.05±0.03), with no statistical significance either (P > 0.05). ConclusionsOn a condition of achieving same image quality, CT scan program using GE Discovery HD CT 750 with 40% ASiR reconstruction and 4 units NI value enhancement could effectively reduce radiation dose on children's temporal bone compared to FBP method using GE Lightspeed VCT 64. |
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