Table 4 Correlations of quantitative parameters between perfusion computed tomography and dual-energy computed tomography in patients with solitary pulmonary nodule (SPN).

From: Dual-energy computed tomography as a lower radiation dose alternative to perfusion computed tomography in tumor viability assessment

Correlation

r

r2

p

BF and IC

+ 0.78

0.61

0.000

BV and IC

+ 0.73

0.53

0.000

PS and IC

+ 0.38

0.14

0.044

Tmax and IC

− 0.28

0.08

0.147

BF and NIC

+ 0.71

0.53

0.000

BV and NIC

+ 0.73

0.53

0.000

PS and NIC

+ 0.35

0.12

0.064

Tmax and NIC

− 0.21

0.05

0.266

  1. BF blood flow, BV blood volume, PS permeability surface area product, Tmax time-to-maximum of the tissue residue function, IC iodine concentration, NIC normalized iodine concentration: R, correlation coefficient; R2, square of the correlation coefficient; and P, statistical significance.
Back to article page