Abstract
A theoretical method for identifying optimal x-ray imaging geometry is presented and applied to cone-beam CT (CBCT) using a flat-panel imager (FPI). The method includes the effects of x-ray source distribution, imaging task, x-ray scatter, and detective quantum efficiency (DQE) on the ICRU-recommended figure of merit for image quality -detectability index. Cascaded systems analysis for FPIs is extended to incorporate the effects of x-ray scatter directly into the DQE. For the FPI-CBCT prototype being implemented for image-guided radiotherapy of the prostate, optimal magnification is ∼1.4-1.6, depending primarily on the magnitude of the x-ray scatter fraction.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 106-107 |
| Number of pages | 2 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 1 |
| State | Published - 2000 |
| Externally published | Yes |
| Event | 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, United States Duration: Jul 23 2000 → Jul 28 2000 |
ASJC Scopus subject areas
- Signal Processing
- Biomedical Engineering
- Computer Vision and Pattern Recognition
- Health Informatics