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Fig. 2. Boxplots of vein diameters on CT in patients with and without
right-sided heart disease at echocardiography. Horizontal line through each
box represents median diameter. Top and bottom of each box represent
interquartile ranges (75% and 25%). Whiskers mark 95% range; circles indicate
outliers. Mean diameter of each vessel in this graph, except for that of
suprahepatic inferior vena cava in CT examinations with low injection rate,
was significantly larger when right-sided heart disease was found (dotted
lines) at echocardiography than when it was not (solid lines)
(p < 0.05 for each). However, extensive overlap is seen between
vessel diameters in patients with and without right-sided heart disease. IVC =
inferior vena cava.