DUAL-ENERGY CT- EFFECTIVE DOSE REDUCTION USING THE ITERATIVE RECONSTRUCTION ALGORITHM SINOGRAM AFFIRMED ITERATIVE RECONSTRUCTION
Abstract
Aim. To evaluate the influence of the iterative reconstruction on the effective dose obtained from dual-energy CT (DECT).
Method. The effective dose was calculated within the 11 groups per 40 examinations performed using first and second generation of dual-source systems.
Examinations were obtained in single-source single-energy and dual-source dual-energy regimens in thoracic or abdominal regions including the protocols containing iterative data reconstruction using algorithm sonogram affirmed reconstruction (SAFIRE). Results.
Using the t-test for independent data samples was confirmed, that the effective dose obtained with DECT regimen does not differ from those obtained in single-source-single-energy regimen, even if both using SAFÍRE algorithm (p = 0.0299; 0.9337; 0.8207), but on the other side the significant diference occured between DECT with and without iterative reconstruction (p < 0.0001 in all). Conclusion.
The iterative reconstruction enables the significant reduction of the effective dose in DECT to the doses equivalent to single-source sytems.