| Autor: |
Veronique Rebuffel, Loick Verger, Irène Buvat, G. Montemont, Charlotte Robert |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC). |
| DOI: |
10.1109/nssmic.2009.5402000 |
| Popis: |
Because of the trade-off between spatial resolution and sensitivity resulting from the collimation, conventional Anger NaI-based gamma-cameras have reached their limits. To overcome these limitations, the HiSens architecture was proposed. Based on the use of a pixelated CdZnTe (CZT) detector, this architecture is characterized by an accurate 3D localization of the interactions inside the detector using a fine sampling of the CZT detector and the Depth Of Interaction (DOI) information. To reduce acquisition time or to improve image quality for a given acquisition time, a high aperture collimator is associated with the HiSens architecture. The aim of the present work is to determine the characteristics of a parallel hole collimator dedicated to scintimammography applications when using the HiSens architecture. To reach this goal, a Detective Quantum Efficiency (DQE) study was first used and the results were then validated using numerical simulations. They show that in geometric conditions corresponding to scintimammography, a 3.6 increase in sensitivity can be achieved while preserving the LEHR image quality, suggesting that the acquisition duration or the injected activity could be reduced by a factor 3.6. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
