Correlations Between Body Weight and Size-Specific Dose Estimate on Thoracic Computed Tomography Examination

The dose received by a patient on CT examination is expressed in size-specific estimates (SSDE) which function of the diameter, x-ray attenuation, and scanner output (volume computed tomography index, CTDIvol). Patient diameter attenuation are represented as water equivalent (Dw). We conducted research to analyze relationships between body weight Dw, CTDIvol, contrast-enhanced thorax examinations. used images from 100 patients (50 women 50 men patients) whose range 2.8 kg 80 kg. values SSDE were automatically calculated axial using IndoseCT software. Statistical analysis showed that patient's correlates linearly with Dw. linearity coefficient (R2) for Dw 0.43 (women) 0.55 (men). However, was independent terms CTDIvol SSDE. This because system tube current modulation (TCM), adapted size, resulting relatively constant regardless size