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Table 4 Subjective grading of 3.0 T (0.10 mmol/kg) and 5.0 T (0.05 mmol/kg) images

From: The feasibility of half-dose contrast-enhanced scanning of brain tumours at 5.0 T: a preliminary study

 

Subjective grading

P value

 

3.0 T

5.0 T

 

Tumoura

Delineation

8.1 ± 0.3

8.9 ± 0.3

0.000

Internal structure

7.8 ± 0.3

8.7 ± 0.4

0.000

Contrast agent enhancement

8.1 ± 0.3

8.6 ± 0.5

0.037

Image qualitya

Grey‒white differentiation

8.1 ± 0.3

8.4 ± 0.6

0.193

Homogeneity

8.2 ± 0.4

8.2 ± 0.4

0.678

Artefactsb

Motion

8.9 ± 0.3

8.7 ± 0.7

0.343

Pulsation

8.8 ± 0.4

8.7 ± 0.4

0.343

Susceptibility

8.5 ± 0.5

8.3 ± 0.4

0.343

Overall sequence quality

8.2 ± 0.4

8.9 ± 0.3

0.001

  1. a10-point scale (from 0 = nondiagnostic to 10 = excellent)
  2. b10-point scale for artefacts (from 0 = nondiagnostic images to 10 = no artefacts)