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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/58343
標題: | 飛行時間信息與全域變異數最小化在雙平板正子攝影系統的應用與分析 Time-of-Flight Image Reconstruction for Dual-Head Flat-Panel PET with TV Minimization Constraint |
作者: | Hung-Yi Chou 周宏屹 |
指導教授: | 周呈霙(Chang-Ying Chou) |
關鍵字: | 正子斷層掃描,時間飛行信息,全域變異數最小化, Positron emission tomography,Time-of-flight,Total variation constraint, |
出版年 : | 2014 |
學位: | 碩士 |
摘要: | Dual-head small-animal positron emission tomography (DHAPET) has characteristics of high detection sensitivity and flexible system configurations. However, the systemgeometry may result in severe parallax errors and undetected events along the trans-axial directions, thus reducing the image quality.With the advancement of detector hardware, time-of-flight (TOF) of photons can be detected, which has demonstrated significant improvement in image quality, and can greatly benefit its use in research studies and clinics. Algorithms like total variation (TV) minimization methods that aim to compensate the effects of data truncation can be employed to reconstruct images with better resolution and quality. In this work, we will numerically compute the DHAPET system response matrix that includes TOF information and propose a TOF-PET reconstructionalgorithm based on TV-minimization. By applying both TOF information and TV minimization in the iterative algorithm, the reconstructed images can be anticipated to have improved quality with better spatial resolution. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/58343 |
全文授權: | 有償授權 |
顯示於系所單位: | 生物機電工程學系 |
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