Abstract
Fan-beam scan is a configuration widely used in clinical computed tomography (CT) because it is easy to implement and control. Filtered-backprojection(FBP)-based algorithms have been developed previously for exact reconstruction of the entire image or an ROI within the image from the data acuqired in fan-beam scans. Recently, we have developed a 3D FBP-based algorithm for image reconstruction on Pi-line segments in a helical cone-beam scan. In this work, we demonstrated that the 3D FBP-based algorithm indeed provided a rather general FBP-based formulation for image reconstruction. Based upon this formulation we derived new FBP-based algorithms for image reconstruction in the fan-beam scans, which can be interpreted as the special case of the helical scan. Existing algorithms corresponding to the new derived algorithms were identified. We also performed a preliminary numerical study to verify our theoretical results. The results in the work can readily be generalized to other non-circular trajectories.
| Original language | English (US) |
|---|---|
| Article number | M2-193 |
| Pages (from-to) | 2530-2533 |
| Number of pages | 4 |
| Journal | IEEE Nuclear Science Symposium Conference Record |
| Volume | 4 |
| State | Published - 2004 |
| Event | 2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy Duration: Oct 16 2004 → Oct 22 2004 |
Keywords
- Computed tomography (CT)
- Fan-beam
- Image reconstruction
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging