Table 2 5-point Likert scale evaluation of MRS

1

Saturation pulse exactly at the margin

Spectra all over the margin of the PZ of good diagnostic quality

Segmentation curve lies exactly at the margin of the prostate

2

Gap between the prostate and one or more of the saturation pulses

Spectra all over the margin of the PZ are minimally distorted but still of good diagnostic quality

Segmentation curve extends beyond the prostate margin and covers parts of the peri-prostatic tissues

3

One or more of the saturation pulses cover part of the PZ

Spectra all over the margins of the PZ are markedly distorted with poor diagnostic quality

Segmentation curve covers the prostate, but ≤ 20% of the PZ are not included

4

One or more of the saturation pulses cover the whole PZ

≤ 20% of the PZ pixels are distorted with poor diagnostic quality

Segmentation curve covers the prostate, but > 20% of the PZ are not included

5

One or more of the saturation pulses cover the prostate completely

> 20% of the PZ pixels are distorted with poor diagnostic quality

Segmentation curve totally away from the prostate (prostate not included within the curve)