Congress:
EuroSafe Imaging 2016
Keywords:
Action 3 - Optimisation, diagnostic reference levels, image quality, Action 2 - Clinical diagnostic reference levels (DRLs)
Authors:
K. K. Oguz, T. Cankurtaran, O. Akça, E. Akpinar, A. Güneş, E. Bulut, B. Ozgen Mocan
DOI:
10.1594/esi2016/ESI-0006
Conclusion and Recommendations
Limitations:
Some of the effective dose results of this study are inconsistent with high pitch literature.
Those results must be confirmed with future studies and using of high pitch imaging with first generation dual tube scanners in paranasal sinus examinations should be made with caution.
As first generation dual tube scanners don't have additional filters and predetector collimators,
effective radiation dose could be more than expected in small scan lenghts as used in this study.
Radiation doses used in the study are acquired from CTDIvol and DLP values.
Real dosimeter measurements wasn't acquired.
DLP does’nt reflect real organ dose.
DLP for standard pitch images were calculated according to 16 cm diameter phantom but high pitch images DLP values were calculated for 32 cm diameter phantom.
Conclusion and Recommendations :
1.Diagnostic quality images can be acquired with a tube current of 50 mAs
2.20-50 mAs images can be used for diagnostic purposes in case of recurrent imaging.
Protocols with a tube current of 20-50 mAs may provide enough diagnostic quality but should be used carefully as small osseous structures like temporal bone and soft tissues couldn't be visualized well.
3.With automatic tube current modulation techniques 120 kV reference mAs 50 could be used.
3.In first generation dual tube MDCT scanners high pitch images had similar SNR and similar image quality with low pitch images