| Autor: |
O, Ernst, L, Gaillandre, D, Mizrahi, G, Sergent, P, Bonvarlet, C, L'Herminé |
| Jazyk: |
francouzština |
| Rok vydání: |
1995 |
| Předmět: |
|
| Zdroj: |
Journal de radiologie. 76(12) |
| ISSN: |
0221-0363 |
| Popis: |
In helical CT, there are 4 mains factors of quality: The in-plane spatial resolution that is the same in conventional CT; The spatial resolution on the Z axis, which is the slice thickness. The increase factor of the slice thickness between a conventional and a helical CT depends on the pitch and the reconstruction algorithm. The value of the increase factor can be easily calculated; The signal to noise ratio which depends on the collimation, the mA, the KV and the reconstruction algorithm. The signal to noise ratio is not depending on the table speed; The reconstruction interval which can be less than the slice thickness. Then the contrast of small lesion is improved and stair-step artifacts are reduced in 3D reformations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
