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Table 1 Summary of sequence parameters for the Siemens OAI protocol and optimized equivalent protocols for the GE and Philips 3.0T scanners

From: Comparison of 3T MR scanners in regional cartilage-thickness analysis in osteoarthritis: a cross-sectional multicenter, multivendor study

Vendor

Siemens

Philips

GE

Sequence

3D DESS

3DWATSf

3D GE

Fat saturation/water excitation (WE)

WE

WE

Fat sat

FOV (mm)

140

140

140

Number of slices

160

120

210

Slice thickness (mm)

0.7

0.7

1

Slice gap (mm)

0

0

-0.5

Flip angle (deg)

25

25

25

TE (ms)

4.7

9.2

4.9

TR (ms)

16.3

20

16.8

X-resolution (mm)

0.37

0.36

0.55

Y-resolution (mm)

0.46

0.48

0.62

Scan time

10 min 35 s

3 min 51 s

6 min 22 s

  1. D.ESS, dual-echo steady state; GE, gradient echo; WATSf, water selective (fluid).