Calidad de imagen y reducción de dosis en angiotomografía computarizada de arterias coronarias usando protocolo de baja energía

摘要

The objective of this study was to quantify the radiation dose reduction without impairing imagequality, using 100 and 120 kiloVolts acquisition protocols. We analyzed 37 non-obese patients in a privatehospital in Santiago, Chile, of which 20 were obtained with a protocol of 120 kiloVolts and the remaining17 with low energy protocol. The quality of the image was evaluated quantitatively and qualitatively. Theaverage image quality score for the 120 and 100 kiloVolts groups was 3.25 ± 0.8 and 3.41 ± 0.7 respectively, demonstrating an improvement in the image quality, although at a non-signifcant value (p= 0.58).In the images obtained with the 100 kiloVolts protocol, a reduction of 41.99% in the radiation dose wasdemonstrated in addition to a signifcant increase of the intensity of the signal and the noise. It was possible to demonstrate a decrease of the radiation dose without detriment in the diagnostic image quality incoronary angiography using computed tomography.