Evaluation of 10 mAs and low-contrast CT image optimization based on the multitractal spectrum in brain of infant
10.3760/cma.j.issn.0254-5098.2009.01.036
- VernacularTitle:基于多重分形谱的婴幼儿10 mAs低分辨率CT图像优化分析
- Author:
Hehong LI
;
Liangping LUO
- Publication Type:Journal Article
- Keywords:
Infants;
Muiltifractal spectrum;
Tomogaphy;
X-ray computed
- From:
Chinese Journal of Radiological Medicine and Protection
2009;29(1):106-108
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze scanned image optimization based on the multifractal soectrum and image fractal algorithm of 64-slice spiral CT in brain of infant. Methods The image data of Toshiba Aquilion 64-slice CT scanning using 10 mAs were imported to image processing toolboxs of Matlab 7.1. The evaluation of muhifractal spectrum and image denosing were performed, and compared with image quality of conventional low-dose CT using 50 mAs. Results The low-contrast scanned image used 10 mAs is the valueless medical image because of serious noise. Image denoise based on the fractal model had superior characteristic of image detail preserving and better contrast-to-noise ratio(CNR). There existed a group difference in the score of image quality between the rude imaging noise and optimized image based on the muhffraetal spectrum algorithm, though the score was still significantly lower than the normal dosage scanned image(F = 38.85, P < 0.01). The group difference was also manifested the image quality of infants can achieve basieaUy the request of clinical diagnosis by suitable model denoising algorithm. Conclusions Image denoising based on the multifraetal spectrum model can be used on the low-dose and low-contrast CT image optimization. It improved the CNR of the pathological region. The radiation dose of CT scanning in infants would be declined significantly by its further application in the future.
