Table 2 Percent volume obliteration in DWI in different regions of the head phantom.

From: Correcting B0 Field Distortions in MRI Caused by Stainless Steel Orthodontic Appliances at 1.5 T Using Permanent Magnets – A Head Phantom Study

 

anterior frontal lobes

temporal lobes

fronto-parieto-occipital lobes

Basal ganglia and thalami

Brain-stem

Cere-bellum

Baseline (no braces)

0

0

0

0

0

0

Small model braces

21

19

0

0

14

33

Medium model braces

17

19

0

0

17

38

Large model braces

18

14

0

0

17

32

Small model braces/correction

3

8

0

0

0

0

Medium model braces/correction

3

1

0

0

0

6

Large model braces/correction

0

0

0

0

0

0

Small model braces/correction/tilting

2

2

0

0

0

0

Medium model braces/correction/tilting

2

3

0

0

0

2

Large model braces/correction/tilting

0

0

0

0

0

0