320 MDCT | 64 MDCT | p Value | |
---|---|---|---|
Attenuation | |||
Non contrast | |||
Aorta | 60 | 38 | <0.001 |
Liver | 52 | 49 | 0.085 |
CTCA | |||
Aorta | 500 | 495 | 0.801 |
Septum | 85 | 138 | <0.001 |
Liver | 62 | 66 | 0.466 |
Noise | |||
Non contrast | |||
Aorta | 19 | 20 | 0.564 |
Liver | 34 | 31 | 0.013 |
CTCA | |||
Aorta | 37 | 40 | 0.014 |
Septum | 34 | 41 | <0.001 |
Liver | 40 | 41 | 0.558 |
CNR | |||
Non contrast | |||
Aorta | 19 | 20 | 0.564 |
Liver | 34 | 31 | 0.013 |
CTCA | |||
Aorta | 37 | 40 | 0.014 |
Septum | 34 | 41 | <0.001 |
Liver | 40 | 41 | 0.558 |
Bold represents statistically significant values.
CNR, contrast to noise ratio; CTCA, CT coronary angiography; MDCT, multidetector CT.