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Table 3 Comparison of SNR measurements as a proxy for uniform intra-luminal blood signal suppression (n = 93)

From: Ferumoxytol enhanced black-blood cardiovascular magnetic resonance imaging

 

Pre-FE

HASTE DIR

Post-FE

HASTE

P value

Image noise

10.0 (6.7–16.5)

9.7 (6.2–15.1)

0.344*

Homogeneity index

108.0 (65.0–170.4)

24.5 (18.0–32.8)

<0.001*

Signal-to-noise ratio (SNR)

Overall

21.5 (12.5–39.4)

5.6 (3.2–10.0)

<0.001**

SVC

11.2 (5.6–23.0)

6.2 (3.5–13.0)

<0.001**

RA

11.3 (5.1–23.6)

3.3 (2.2–6.2)

<0.001**

RV

6.4 (2.7–12.3)

2.7 (1.6–6.0)

<0.001**

LA

27.5 (10.8–47.0)

4.3 (2.4–7.1)

<0.001**

LV

22.4 (5.1–44.3)

3.7 (2.0–5.6)

<0.001**

MPA

18.5 (8.1–38.0)

6.2 (2.9–10.9)

<0.001**

RPA

22.3 (6.9–37.2)

5.4 (2.9–12.3)

<0.001**

LPA

22.0 (8.0–47.1)

6.1 (3.4–11.7)

<0.001**

Asc Ao

12.4 (5.0–29.6)

5.1 (2.9–9.2)

<0.001**

Dsc Ao

33.2 (15.3–67.6)

6.9 (3.4–15.1)

<0.001**

  1. Values are reported as median and interquartile range
  2. Asc Ao ascending aorta, DIR double-inversion recovery, Dsc Ao descending aorta, FE ferumoxytol enhanced, LA, left atrium, LPA left pulmonary artery, LV left ventricle, MPA main pulmonary artery, RA right atrium, RPA right pulmonary artery, RV right ventricle, SNR signal-to-noise ratio, SVC superior vena cava
  3. *Wilcoxon rank sum test; **ANOVA for repeated measures