Fast Algorithms for 3D Cone-Beam Tomography

3D 锥形束层析成像的快速算法

• 批准号: 0209203
• 负责人: Yoram Bresler
• 金额: $ 33.29万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0209203&HistoricalAwards=false
• 关键词: Fast; Algorithms; 3D; Cone; Beam

ABSTRACTBresler, Yoram0209203U of IllTomography, or the reconstruction of an object from a collection of its line integrals from various directions (known as its x-ray transform) is a well known problem. Perhaps most importantly, it is the principle underlying most of the key diagnostic imaging modalities including x-ray Computed Tomography (CT), PET and SPECT, certain forms of MRI, and emerging techniques such as electric impedance tomography (EIT) and optical tomography. Tomographic reconstruction is also widely used for nondestructive evaluation (NDE) in manufacturing, and has been recently proposed for safety screening of passenger luggage in airports. Tomography is also the fundamental principle in numerous other problems and applications in science and engineering from electron microscopy of subcellular structures through geophysical exploration and environmental monitoring, to remote sensing by synthetic aperture radar (SAR). In cone-beam tomography, projections are acquired by an area detector, using a source of divergent rays traveling on a one of several possible trajectories. It is already used in current PET and SPECT scanners and in NDE, and because it appears to be the only practical method for rapid volume acquisition, it will be the basis for the next generation of diagnostic CT scanners. This will allow to use CT as a dynamic imaging modality for cardiac imaging or for real-time surgical guidance in medicine, or as a high-throughput NDE system in manufacturing.

AbstractBresler，Yoram0209203U的IlltoMography或从各个方向（称为其X射线变换）中从其线积分集合中重建对象是一个众所周知的问题。也许最重要的是，这是大多数关键的诊断成像方式的基础，包括X射线计算机断层扫描（CT），PET和SPECT，某些形式的MRI和新兴技术，例如电阻抗层析成像（EIT）和光学层析成像。层析成像重建也广泛用于制造业中的非破坏性评估（NDE），最近已提议用于对机场乘客行李的安全筛查。断层扫描也是从地球物理探索和环境监测到通过地球物理探索和通过合成孔径雷达（SAR）进行遥感的科学和工程中许多其他问题和应用中的基本原理。 在锥形束断层扫描中，使用区域探测器的预测是使用在几种可能的轨迹之一上行驶的不同射线来源的。它已经在当前的PET和SPECT扫描仪以及NDE中使用，并且由于它似乎是快速批量获取的唯一实用方法，因此它将成为下一代诊断CT扫描仪的基础。这将允许使用CT作为心脏成像或医学实时手术指导或制造中的高通量NDE系统的动态成像方式。