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This project describes the different techniques that can be implemented during coronary computed tomography angiography (CCTA) to reduce patient dose. CCTA exams are becoming increasingly popular in diagnosing coronary artery disease (CAD) due to its noninvasive nature. However, CCTA exams provide some of the greatest radiation dose of any computed tomography exam. As a result of this exam, patients can receive a total effective dose anywhere from 15 millisieverts (mSv) to 20 mSv and higher. This project discusses reducing dose by means of electrocardiogram (ECG) – triggered prospective gating, reducing tube potential and bolus tracking. Also, the proper use and limitations of these techniques are specified to ensure proper use each dose reduction method. These limitations include a resting heart rate between 50-65 beats per minute (BPM) and a body mass index (BMI) of < 30 kg/m2. The correct use and implementation of these techniques can result in an average 31% to 72% total reduction of patient dose without compromising image quality.
Coronary Computed Tomography Angiography, CCTA, Reducing Dose, Prospective Gating, Tube Potential, Bolus Tracking
Medicine and Health Sciences
Ambrosio, Mariah, "Reducing Dose In Coronary Computed Tomography Angiography (CCTA)" (2021). Student Research Poster Presentations 2021. 19.