Improved Image Quality and Decreased Radiation Dose of Lower Extremity Computed Tomography Angiography Using Low-Tube-Voltage and Adaptive Iterative Reconstruction
| Autor: | Maoqing Jiang, Yu-Ning Pan, Ai-Jing Li, Da-Wei Ren, Jie Zhang, Zhaoqian Chen, Qiu-Li Huang |
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| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty Image quality Iterative reconstruction Signal-To-Noise Ratio Radiation Dosage 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Imaging Three-Dimensional medicine Humans Radiology Nuclear Medicine and imaging Prospective Studies Computed tomography angiography Aged Aged 80 and over medicine.diagnostic_test Radon transform business.industry Radiation dose Angiography Middle Aged Signal-to-noise ratio (imaging) Lower Extremity 030220 oncology & carcinogenesis Feasibility Studies Radiographic Image Interpretation Computer-Assisted Female Radiology Tomography Nuclear medicine business Tomography X-Ray Computed Algorithms |
| Zdroj: | Journal of computer assisted tomography. 40(2) |
| ISSN: | 1532-3145 |
| Popis: | OBJECTIVE The aim of the study was to investigate the feasibility of low-tube-voltage computed tomography (CT) in combination with 3-dimensional adaptive iterative dose reduction (AIDR-3D) algorithm in lower extremity CT angiography. METHODS The CT data of the 120-kV group (n = 30) were reconstructed with filtered back projection (FBP) algorithm. The CT data of the 100-kV group (n = 30) were reconstructed with FBP as well as AIDR-3D algorithms. RESULTS The 100-kV group showed significantly lower dose-length product than the 120-kV group (P < 0.05). In comparison with the 120-kV and FBP protocol, the 100-kV and FBP protocol showed significantly increased vascular density and noise (P < 0.05). However, in the 100-kV group, images reconstructed with AIDR-3D showed significantly lower noise and significantly higher signal-to-noise ratio and contrast-to-noise ratio than FBP (P < 0.05). CONCLUSIONS Low-tube-voltage (100 kV) 320-row CT in combination with AIDR-3D reconstruction can significantly improve the image quality and reduce radiation dose of lower extremity CT angiography. |
| Databáze: | OpenAIRE |
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