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Table 2 Linear regression and Bland-Altman analysis of segmental perfusion

From: Influence of the arterial input sampling location on the diagnostic accuracy of cardiovascular magnetic resonance stress myocardial perfusion quantification

AIF sampling location Slope
(95 % CI)
R2 p-value Bias
(95 % CI)
MBF
 Left atrium 0.988 (0.959–1.017) 0.850 < 0.001 − 0.14 (0.76)
 Mid-left ventricle 0.985 (0.955–1.015) 0.836 < 0.001 0.07 (0.80)
 Apical left ventricle 1.102 (1.035–1.169) 0.567 < 0.001 0.21 (1.78)
 Aortic root 0.903 (0.877–0.928) 0.858 < 0.001 − 0.19 (0.70)
MPR
 Left atrium 0.842 (0.781–0.902) 0.654 < 0.001 0.09 (1.23)
 Mid-left ventricle 0.761 (0.712–0.811) 0.693 < 0.001 − 0.08 (1.09)
 Apical left ventricle 0.578 (0.456-0.700) 0.177 < 0.001 − 0.01 (2.54)
 Aortic root 0.929 (0.878–0.981) 0.760 < 0.001 − 0.05 (1.02)
  1. Comparisons for each AIF sampling location were performed against the clinical reference basal left ventricle (bLV). The bias (mean difference) for MBF is measured in units of mL/g/min. Positive bias indicates measurement overestimation compared to bLV. AIF arterial input function, CI confidence interval, MBF myocardial blood flow, MPR myocardial perfusion reserve