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Table 1 Comparison of the mean pulmonary diameter ± standard deviation (maximum; minimum values for TWIST and Conventional CE-MRA respectively.

From: Time-resolved mr venography pre catheter-based ablation for atrial fibrillation

 

TWIST (Time-Resolved MRA)

Conventional CE-MRA

P-values

RUPV

   

cc

1.58 ± 0.27 (2.08;1.2)

1.68 ± 0.24 (2.08;1.13)

0.069

ap

1.13 ± 0.23 (1.52;0.63)

1.16 ± 0.19 (1.66;0.88)

0.521

RLPV

   

cc

1.69 ± 0.19 (2.06;1.41)

1.72 ± 0.16 (2.14;1.49)

0.307

ap

1.22 ± 0.23 (1.65;0.79)

1.32 ± 0.24 (1.84;0.98)

0.005

LUPV

   

cc

1.51 ± 0.33 (2.14;0.47)

1.53 ± 0.31 (2.26;0.59)

0.456

ap

1.05 ± 0.28 (1.73;0.35)

1.09 ± 0.25 (1.69;0.53)

0.168

LLPV

   

cc

1.54 ± 0.33 (2.64;1.04)

1.57 ± 0.28 (2.34;1.1)

0.573

ap

1.00 ± 0.27 (1.63;0.52)

0.97 ± 0.23 (1.47;0.49)

0.286

  1. All values in cm. cc = measures in cranial-caudal direction; ap = measures in anterior-posterior direction. The t-test revealed a value of 0.004933 which is much less that the level for statistical significance of 0.05. Therefore, the difference between the measuring ability of TWISE and Conventional CE-MRA is not statistically significant.