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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43686
標題: | 利用磁振造影腦部影像模擬X光電腦斷層影像衰減係數校正圖譜應用於正子電腦斷層暨磁振造影雙功能掃描系統 Hybrid PET/MRI Brain Imaging Using MRI as CT-Simulated Attenuation Map |
作者: | Shu-Min Yiang 楊淑敏 |
指導教授: | 鍾孝文(Hsiao-Wen Chung) |
關鍵字: | PET/MRI,PET/CT,衰減校正,雙功能影像造影系統, PET/MRI,Attenuation Correction,PET/CT,The Hybrid Image System, |
出版年 : | 2009 |
學位: | 碩士 |
摘要: | The purpose of this study was to investigate the toolbox based on the attenuation correction algorithm proposed by Thomas Beyer at el. in 2008 which seems to be useful for PET image reconstruction using MRI data in the brain. We retrospectively included six patients who had MRI examination and the FDG PET/CT scan. Histogram-matching algorithm was applied to transform the MR images to the so-called “pseudo-CT” images which are simulated as attenuation correction map for PET image reconstruction. The two model corrected PET images were visually analyzed and SUV were compared.
The results showed better image quality and good correlation of SUV analysis on both supra-tentorial brain images than on infra-tentorial brain images. It is therefore the intensity transformation method seems to provide a simple way to transform the MR images to pseudo-CT for the attenuation correction of PET images in PET/MR, but needs more technical implementation to solve some pitfalls in the future. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43686 |
全文授權: | 有償授權 |
顯示於系所單位: | 生醫電子與資訊學研究所 |
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ntu-98-1.pdf 目前未授權公開取用 | 3.16 MB | Adobe PDF |
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