الفهرس 
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Abstract
• In this study it was shown that there are some technical factors that were not feasible, as calculating the radiation dose in each tube angulations for every patient, upgrading the machine, these factors seem to affect radiation dose in a non-simple linear mode .and these are important issues that must be put in considerations.
• Long term follow up for children who were subjected to radiation exposure during cardiac catheterization always remains an important issue that needs further investigation to determine the long term radiation effects.
• It was not feasible in our laboratories to remove the anti-scatter grids when catheterizing small children. When possible, however, a significant reduction in radiation dose is possible without compromising image quality.
• We were not able to bring new equipments, as aging equipment will result in degradation of image quality and a need for higher radiation doses. So repair and/or replace aging equipment as required.