Congress:
EuroSafe Imaging 2016
Keywords:
Action 3 - Optimisation, diagnostic reference levels, image quality, Action 2 - Clinical diagnostic reference levels (DRLs)
Authors:
V. Lehotska, D. Salat, J. KRBATA
DOI:
10.1594/esi2016/ESI-0019
Description of activity and work performed
The realization of the survey of CT exposures of the children was accomplished by the application of the automatized Dose Quality Control System (DQC) ,
in the year 2015.
During our study there were analyzed
2 190 patients and 4 336 scan series.
DQC system enables the estimation and analyses of the amount of energy delivered to the patient´s body by the CT scanner,
determined by using appropriate conversion factors which account for the attenuation of the patient´s body size and all other scan parameters (CTDI a DLP ).
The estimation of the local diagnostic reference values (LDRL) has been performed by the statistical adopting of the third quartile of the mean doses of all exposed patients ,plotted as the function of the type of procedure and weight of the patient.
Due to the large effect of size of the patient on the scan length,
we have divided the examined patients in several groups ( <5 kg,
5-14 kg,
15-29 kg,
30-49 kg,50-79 kg,
>80 kg)