حفاظت پرتویی بیماران در سی تی آنژیوگرافی قلب

Introduction: Cardiac CT (Computed Tomography) angiography applies as a pre-exam method for evaluating the patients with medical problems in their cardiac arteries. Due to the high delivered dose in this imaging method, dose reduction techniques and imaging strategies that serve the images quality with minimum patient dose are the subjects for investigation and research studies. This study will evaluate and discuss the clinical aspects and dose reduction techniques in cardiac CT angiography briefly. Methods and Materials: This research is theoretical and analytical method that was performed by searching “cardiac CT angiography, radiation protection, and patient’s dose reduction methods” key words in the Google Scholar, Science Direct, PubMed and Scopus web sites in terms of content (Content Analysis). This article was written based on the 10 chosen articles which were found after the research in the internet web sites. Results: Various applied techniques like tube current control using ECG (electrocardiogram), X-ray tube voltage reduction, scan sequence changing methods, greater detector coverage and working modes with higher pitches are available in cardiac CT angiography for reduction in the delivered dose to the patients. Discussion and Conclusion: Several applied strategies are available for dose reduction in cardiac CT angiography in daily applications. Most of these dose reduction strategie which are useful in many patients can be used in most of the clinical cases. Nowadays, many of techniques using dose saving algorithms were presented commercially. It is very essential and important to adapt the scan protocol with any possible dose reduction strategy for every patient as mentioned in the American heart institute scientific meeting in 2008. Combination of several dose saving algorithms are usually feasible and cause to more effective dose reduction in cardiac CT angiography.