Dual Energy CT Angiography of Peripheral Arterial Disease: Feasibility of Using Lower Contrast Medium Volume.

Scan time Analysis of risk factor demonstrated that there were four factors affecting scan time: (a) Hypertension —a significant effect (p = 0.013) was seen to be exerted by hypertension, with the scanning time increasing from 23.5 seconds (non-hypertensives) to 24.5 seconds (hypertensives); (b) Diabetes —a highly significant effect (p = 0.004) was observed in the presence of Diabetes (diabetics vs non-diabetics 24.9 secs vs 23.4 secs); (c) Age —every additional year of age was reflected in a reduction of scanning time by 0.038 seconds.

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The interaction between group body parts was significant with CT attenuation and CNR (p = 0.002 and 0.003 respectively), and marginally significant with SNR (p = 0.047), with minimal changes noticed between the two groups.

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