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学科主题: 临床医学
题名:
Evaluation of dose reduction and image quality in chest CT using adaptive statistical iterative reconstruction with the same group of patients
作者: Qi, L-P; Li, Y.; Tang, L.; Li, Y-L; Li, X-T; Cui, Y.; Sun, Y-S; Zhang, X-P
刊名: BRITISH JOURNAL OF RADIOLOGY
发表日期: 2012-10-01
DOI: 10.1259/bjr/66327067
卷: 85, 期:1018, 页:E906-E911
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Radiology, Nuclear Medicine & Medical Imaging
研究领域[WOS]: Radiology, Nuclear Medicine & Medical Imaging
关键词[WOS]: FILTERED BACK-PROJECTION ; TUBE CURRENT MODULATION ; COMPUTED-TOMOGRAPHY ; INITIAL-EXPERIENCE ; PEDIATRIC-PATIENTS ; RADIATION ; ENHANCEMENT ; ANGIOGRAPHY
英文摘要:

Objectives: The objective of this study was to compare the image quality and radiation dose of chest CT images reconstructed with a blend of adaptive statistical iterative reconstruction (ASIR) and filtered back-projection (FBP) with images generated using conventional FBP.

Methods: Patients with chest CT re-examinations were alternately assigned to two scanners with different reconstruction techniques. The study groups included noise index (NI) 11 with 30% ASIR (A30), NI 13 with 40% ASIR (A40), NI 15 with 50% ASIR (A50) and NI 17 with 60% ASIR (A60), sequentially changed every 2 months. The control images were obtained using FBP and NI 11. All acquisitions were performed with automatic dose modulation. Paired t-test and non-parameter test were applied to compare the difference.

Results: The radiation doses were significantly lower in the examinations that used ASIR (p < 0.001). The mean dose reduction rate was 27.7%, 45.2%, 57.1% and 71.8% for Groups A30, A40, A50 and A60, respectively. The image quality of Groups A30-A50 was not inferior to that of the control examinations. The image noise of Group A60 was greater and subjective image quality was inferior to that of the control.

Conclusions: ASIR enabled the use of a higher NI with automatic dose modulation. With 50% ASIR and a NI of 15, the effective radiation dose was reduced by 57%, without compromising image quality.

语种: 英语
所属项目编号: 2011CB707705 ; 30970825
项目资助者: National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China
WOS记录号: WOS:000309669800015
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/51671
Appears in Collections:北京大学临床肿瘤学院_期刊论文

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作者单位: Peking Univ, Sch Oncol, Beijing Canc Hosp & Inst,Dept Radiol, Key Lab Carcinogenesis & Translat Res,Minist Educ, Beijing 100142, Peoples R China

Recommended Citation:
Qi, L-P,Li, Y.,Tang, L.,et al. Evaluation of dose reduction and image quality in chest CT using adaptive statistical iterative reconstruction with the same group of patients[J]. BRITISH JOURNAL OF RADIOLOGY,2012,85(1018):E906-E911.
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