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KMID : 0357520160390040543
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Journal of Radiological Science and Technology
2016 Volume.39 No. 4 p.543 ~ p.547
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Dynamic Computed Tomography based on Spatio-temporal Analysis in Acute Stroke: Preliminary Study
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Park Ha-Young
Pyeon Do-Yeong
Kim Da-Hye
Jung Young-Jin
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Abstract
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Acute stroke is a one of common disease that require fast diagnosis and treatment to save patients life. however, the acute stroke may cause lifelong disability due to brain damage with no prompt surgical procedure. In order to diagnose the Stroke, brain perfusion CT examination and possible rapid implementation of 3D angiography has been widely used. However, a low-dose technique should be applied for the examination since a lot of radiation exposure to the patient may cause secondary damage for the patients. Therefore, the degradation of the measured CT images may interferes with a clinical check in that blood vessel shapes on the CT image are significantly affected by gaussian noise. In this study, we employed the spatio-temporal technique to analyze dynamic (brain perfusion) CT data to improve an image quality for successful clinical diagnosis. As a results, proposed technique could remove gaussian noise successfully, demonstrated a possibility of new image segmentation technique for CT angiography. Qualitative evaluation was conducted by skilled radiological technologists, indicated significant quality improvement of dynamic CT images. the proposed technique will be useful tools as a clinical application for brain perfusion CT examination.
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KEYWORD
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Perfusion computed tomography (perfusion CT) , Acute stroke , Gaussian noise , Principle component analysis , Spatio-temporal analysis
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