Table 1.

Geometric distortions for four tumor-sites. B₀ related distortions and total geometrical distortion (consisting of B₀ and gradient non-linearity (GNL) related distortions) are reported. Median distortion and maximum (defined in section 2.6 Statistics) are reported. The sign of the B₀ related distortion reflects the direction of the distortion in the frequency-encoding direction (anterior-posterior direction on images in Fig. 1a–d). The B₀ related distortions are reported for a clinical 3D T2W MRI sequence (specifications can be seen in section 2.3 B₀-mapping). Statistical significant difference between the pooled abdominal tumor-sites (adrenal gland, liver, and prostate) and the pelvic tumor-site (prostate) is denoted by * next to the calculated p-values.