Quality Evaluation of Image Recording Strategies for Limited Angle Tomography

• Published in: Tsinghua science and technology Vol. 15; no. 1; pp. 25 - 29
• Main Authors: Stopp, Fabian, Winne, Christian, Jank, Emanuel, Keeve, Erwin
• Format: Journal Article
• Language: English; Chinese
• Published: Elsevier Ltd 01.02.2010; Fraunhofer Institute for Production Systems and Design Technology,10587 Berlin; Department of Maxillofacial Surgery and Clinical Navigation,Charité - Universit(a)tsmedizin Berlin,13353 Berlin,Germany%Fraunhofer Institute for Production Systems and Design Technology,10587 Berlin,Germany%Department of Maxillofacial Surgery and Clinical Navigation,Charité - Universit(a)tsmedizin Berlin,13353 Berlin,Germany
• Subjects: 3-D reconstruction quality; CT图像; intraoperative imaging; limited angle tomography; Mathematical analysis; Reconstruction; Recording; Strategy; Tomography; Trajectories; X-ray source trajectories; X-ray sources; X射线源; 图像质量; 评价策略; 质量指标; 重建算法; 3-D reconstruction quality; intraoperative imaging; X-ray source trajectories; limited angle tomography
• ISSN: 1007-0214; 1878-7606; 1007-0214
• DOI: 10.1016/S1007-0214(10)70004-3

In this paper we propose a new method for evaluating image recording strategies for limited angle tomography. In limited angle tomography exact three-dimensional （3-D） reconstruction is not achievable. With this method a metric for the reachable reconstruction quality by defined X-ray source trajectories is calculated. The result of our method is independent of reconstruction algorithms. Our approach is based on the gradients of the scanned volume and their grade of determinability. Compared to simulated reconstruction accuracy with simultaneous algebraic reconstruction techniques, the method of evaluation shows the same dependencies on X-ray source trajectories. By using the proposed method different source trajectories for a limited angle range are comparable with respect to the reachable reconstruction quality.