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A new method for evaluation of x-ray imaging trajectories for limited angle tomography
|Johns Hopkins University Baltimore; Tsinghua University, Beijing:|
10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine 2009 : September 5-10, 2009, Beijing, China, The 2nd workshop on High Performance Image Reconstruction (HPIR) also adjoined the 10th Fully3D
|International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine (Fully3D) <10, 2009, Beijing>|
Workshop on High Performance Image Reconstruction (HPIR) <2, 2009, Beijing>
| Conference Paper|
|Fraunhofer IPK ()|
| 3D reconstruction quality; intraoperative imaging; limited angle tomography; x-ray source trajectory|
In this paper we propose a new method for evaluation of image recording strategies for limited angle tomography. In limited angle tomography exact 3D reconstruction is not achievable. With our method a metric for the reachable reconstruction quality is calculated. The result is independent of reconstruction algorithms and only depends on the image recording strategy. Our approach is based on the gradients of the scanned volume and their grade of determinability. Our simulation results show that the relative reconstruction accuracy is similar to the simultaneous algebraic reconstruction technique. By using our method different x-ray source trajectories for a predefined limited angle range are now comparable with respect to the reconstruction quality.