Correlation analysis of dual-energy CT iodine maps with quantitative pulmonary perfusion MRI

Table 1 Mean dynamic contrast enhanced-magnetic resonance imaging and dual-energy computed tomography values and SD in visually normal pulmonary parenchyma and areas with restricted perfusion

	Visually normal parenchyma	Perfusion defect	P value
PBF (mL/100 mL per minute)	58.8 ± 36	10.3 ± 5.5	< 0.0001
PBV (mL)	16.6 ± 8.5	5.0 ± 4.0	< 0.0001
MTT (s)	17.1 ± 10.3	21.6 ± 14	0.28
Lodine map (HU)	22.6 ± 8.3	4.0 ± 3.9	< 0.0001

The attenuation given for the Iodine Map represents the pure dual-energy calculated iodine distribution within the pulmonary parenchyma. PBF: Pulmonary blood flow; PBV: Pulmonary blood volume; MTT: Mean transit time; HU: Hounsfield units.