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Table 1 T1 partition coefficient accuracy and reproducibility

From: Modified look-locker inversion recovery T1 mapping indices: assessment of accuracy and reproducibility between MRI scanners

a)

T1

Partition coefficient

1.5T scanners

Accuracy

Reproducibility

Accuracy

Reproducibility

1

6.70 ± 0.46

5.17 ± 0.44

7.93 ± 0.96

2.09 ± 0.92

2

5.97 ± 0.41

5.45 ± 0.33

9.71 ± 0.85

10.67 ± 0.70

3T scanners

    

3

8.01 ± 0.41

4.71 ± 0.33

8.85 ± 0.85

6.36 ± 0.70

4

13.91 ± 0.41

3.80 ± 0.33

8.60 ± 0.85

5.55 ± 0.70

5

10.58 ± 0.41

3.07 ± 0.33

6.66 ± 0.85

2.21 ± 0.70

b)

Field strength

Protocol

 

1.5T

3T

p-value

17 HB

11 HB

p-value

T1 accuracy

6.33 ± 0.31

10.83 ± 0.23

< 0.0001

8.34 ± 0.27

8.83 ± 0.27

0.177

T1 reproducibility

5.31 ± 0.27

3.86 ± 0.19

<0.0001

4.46 ± 0.23

4.71 ± 0.23

0.432

λ accuracy

8.82 ± 0.64

8.04 ± 0.49

0.109

8.32 ± 0.57

8.53 ± 0.57

0.574

λ reproducibility

6.38 ± 0.58

4.71 ± 0.40

0.021

4.50 ± 0.46

6.58 ± 0.46

0.003

  1. Table 1a shows the accuracy and reproducibility results for the 5 scanners used in the multicenter study while b shows the dependence of field strength and protocol on accuracy and reproducibility. Data is presented as least square means ± standard error. Accuracy is reported as the percentage difference between MOLLI and IR-SE. Scan/rescan reproducibility is reported as the relative percent mean difference between two MOLLI scans. Scanners:1- Avanto, Siemens, 1.5T; 2- Achieva, Philips, 1.5T; 3- Verio, Siemens, 3T; 4- Achieva, Philips, 3T; 5- Achieva, Philips, 3T.
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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