| 柴培,聂彬彬,叶婷,武丽伟 综述,单保慈 校审.CT用于PET衰减校正技术的研究进展[J].中国医学影像技术,2010,26(8):1576~1578 |
| CT用于PET衰减校正技术的研究进展 |
| Advances in CT-based attenuation correction techniques for PET |
| 投稿时间：2010-03-18 修订日期：2010-04-28 |
| DOI： |
| 中文关键词: 正电子发射型体层摄影术 衰减校正 双线性 放射摄影术,双能扫描投影 |
| 英文关键词:Positron-emission tomography Attenuation correction Bilinear Radiography, dual-energy scanned projection |
| 基金项目:国家重点基础研究发展计划("973"计划)项目(2006CB705705)、国家自然科学基金(30970768)、国家高技术研究发展计划("863"计划)项目(2006AA020803)。 |
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| 中文摘要: |
| 利用CT对PET进行衰减校正(CTAC)具有扫描时间短、噪声低等优势。实现CTAC的关键在于准确地将X线衰减系数转换为511 keV射线的衰减系数。目前的转换算法主要包括比例缩放法、分割法、双值组合法、双线性法和双能CT法。本文详细介绍这些算法的原理,综述各种算法的优缺点,并对未来CTAC算法的发展动态进行评述。 |
| 英文摘要: |
| The use of CT images for CT-based attenuation correction (CTAC) of PET data results in the decrease of overall scanning time and a noise-free attenuation map. The key of this approach is to accurately convert the linear attenuation coefficients obtained from the CT scan to those correspondingly to the 511 keV. Several conversion strategies have been developed, including scaling, segmentation, hybrid, bilinear and dual-energy CT methods. In this paper, the principles of these various algorithms were described and the advantages and disadvantages of them were analyzed, the future development in CTAC algorithms were reviewed. |
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