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Table 3 Image quality of T1-FSE and MAVRIC-fast depending on LAVA-Flex assessment concerning blurring

From: Metal artifact reduction in patients with dental implants using multispectral three-dimensional data acquisition for hybrid PET/MRI

 

Reader 1

Reader 2

T1-FSE

MAVRIC-fast

p value

T1-FSE

MAVRIC-fast

p value

Distinction of anatomy

      

 Group 1

1.00 ± 0.00

1.80 ± 0.45

0.046

1.25 ± 0.50

1.50 ± 0.58

0.564

 Group 2

2.05 ± 0.76

1.75 ± 0.44

0.109

2.29 ± 0.72

1.67 ± 0.48

0.001*

Blurring

      

 Group 1

2.00 ± 0.71

1.20 ± 0.45

0.102

2.00 ± 0.82

1.00 ± 0.00

0.102

 Group 2

2.80 ± 0.70

1.40 ± 0.68

<0.001*

3.00 ± 0.71

1.48 ± 0.68

<0.001*

Noise

      

 Group 1

1.00 ± 0.00

2.00 ± 0.71

0.059

1.00 ± 0.00

2.00 ± 0.82

0.102

 Group 2

1.70 ± 0.87

2.30 ± 0.47

0.003*

1.62 ± 0.81

2.43 ± 0.51

<0.001*

  1. Image quality was assessed by two readers using a five-point scale from 1 (good depiction/no artifacts) to 5 (not assessable/non-diagnostic), 3 = without diagnostic impairment and 4 = with impairment. Data are mean ± standard deviation. After Bonferroni correction, statistical significance is denoted by p < 0.0167 (* = statistically significant). Group 1: blurring by dental alloys in LAVA-Flex was rated 1, 2, or 3. Group 2: blurring by dental alloys in LAVA-Flex was rated 4 or 5.