| Autor: |
Harpen MD; Department of Radiology, Mobile, Alabama 36617, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
Medical physics [Med Phys] 1999 Nov; Vol. 26 (11), pp. 2231-4. |
| DOI: |
10.1118/1.598778 |
| Abstrakt: |
Presented is a simple model describing the dependence of image noise in computed tomography on the x-ray beam profile. The model is used to derive the x-ray profile which minimizes total image noise at constant integral patient dose. The profile may be produced with a bow-tie-type beam shaping filter. Results of the analysis are validated using a computer simulation of computed tomography (CT) acquisition and reconstruction. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
Plný text