Table 2 Absolute averaged volume difference (cc) and percentage difference (%) from the reference.

From: Comparative study of sub-second temporal resolution 4D-MRI and 4D-CT for target motion assessment in a phantom model

  

Amplitude 1 cm

 

Amplitude 2 cm

 

Amplitude 3 cm

 

4DMRI

4DCT

4DMRI

4DCT

4DMRI

4DCT

Large

Regular

0.47 (2.9%) ± 0.20 (1.2%)

0.09 (0.6%) ± 0.08 (0.6%)

0.47 (2.9%) ± 0.23 (1.4%)

0.16 (1.1%) ± 0.09 (0.6%)

0.48 (3.0%) ± 0.25 (1.5%)

0.19 (1.3%) ± 0.06 (0.4%)

Fast

0.67 (4.1%) ± 0.27 (1.7%)

0.22 (1.5%) ± 0.11 (0.8%)

0.72 (4.4%) ± 0.30 (1.8%)

0.22 (1.6%) ± 0.13 (0.9%)

0.73 (4.5%) ± 0.26 (1.6%)

0.29 (2.1%) ± 0.19 (1.4%)

Small

Regular

0.06 (10.8%) ± 0.03 (5.2%)

0.02 (7.2%) ± 0.01 (2.8%)

0.06 (11.3%) ± 0.03 (5.4%)

0.02 (5.1%) ± 0.01 (2.9%)

0.06 (9.6%) ± 0.03 (6.1%)

0.03 (7.6%) ± 0.02 (5.3%)

Fast

0.05 (9.3%) ± 0.02 (3.4%)

0.03 (9.6%) ± 0.01 (4.0%)

0.06 (10.4%) ± 0.04 (7.2%)

0.03 (7.6%) ± 0.02 (5.7%)

0.06 (11.2%) ± 0.04 (6.5%)

0.04 (11.6%) ± 0.02 (7.1%)

  1. Absolute averaged volume difference and standard deviation (in cc and percentages) from the reference target volume in a regular motion pattern (5 s respiratory) and fast motion pattern (3 s respiratory).
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