mrimaster

Scapula MRI : Protocol and Planning

Indications for MRI Scapula

Contraindications

Patient preparation for MRI Scapula

Positioning for MRI Scapula

MRI scapula positioning

Recommended MRI Scapula Protocols and Planning

Localiser 1

A three-plane localizer must be taken in the beginning to localize and plan the sequences. Localizers are usually less than 25 seconds. T1-weighted low-resolution scans are used for this purpose.

Localiser 2

Plan the coronal and sagittal localizers on the axial plane. For the coronal localizer, angle the position block parallel to the scapular blade, and for the sagittal localizer, angle the position block perpendicular to the scapular blade. For a further axial localizer, position the block perpendicular to the scapular blade on the sagittal plane.

T2 stir axial 3mm SFOV

Plan the axial slices on the coronal plane and angle the positioning block horizontally across the scapular blade. Check the positioning block in the other two planes. An appropriate angle must be used in the sagittal plane, perpendicular to the scapular blade. Slices must be sufficient to cover the whole scapula from the top of the acromioclavicular joint to 1 cm below the inferior angle of the scapula. Adding saturation bands over the chest will help reduce ghosting artifacts from breathing. The phase direction must be anteroposterior with sufficient oversampling to avoid wrap-around and ghosting artifacts from the chest.

Parameters

TR

4000-5000

TE

110

FLIP

160

NEX

2

SLICE

3 MM

MATRIX

256X256

FOV

220-250

PHASE

A>P

GAP

10%

TI

160

T1 tse axial 3mm SFOV

Plan the axial slices on the coronal plane and angle the positioning block horizontally across the scapular blade. Check the positioning block in the other two planes. An appropriate angle must be used in the sagittal plane, perpendicular to the scapular blade. Slices must be sufficient to cover the whole scapula from the top of the acromioclavicular joint to 1 cm below the inferior angle of the scapula. Adding saturation bands over the chest will help reduce ghosting artifacts from breathing. The phase direction must be anteroposterior with sufficient oversampling to avoid wrap-around and ghosting artifacts from the chest.

Parameters

TR

400-600

TE

15-25

SLICE

3 MM

FLIP

160

PHASE

A>P

MATRIX

320X320

FOV

220-250

GAP

10%

NEX(AVRAGE)

2

T1 tse coronal 3mm SFOV

Plan the coronal slices on the axial plane and angle the positioning block parallel to the scapular blade. It’s essential not to exceed a 45° angle with the block, as angling beyond this limit will cause the coronal image to transform into a sagittal image. Check the positioning block in the other two planes. In the sagittal plane, use an appropriate angle parallel to the scapular blade. Ensure that the slices adequately cover the entire scapula, from the anterior portion of the coracoid process to the posterior skin margin. To reduce ghosting artifacts caused by breathing, consider adding an oblique saturation band over the chest. For the phase direction, use right to left with sufficient oversampling to prevent wrap-around and ghosting artifacts from the chest.

Parameters

TR

400-600

TE

15-25

SLICE

3 MM

FLIP

130

PHASE

R>L

MATRIX

320X320

FOV

200-250

GAP

10%

NEX(AVRAGE)

2

T2 stir coronal 3mm SFOV

Plan the coronal slices on the axial plane and angle the positioning block parallel to the scapular blade. It’s essential not to exceed a 45° angle with the block, as angling beyond this limit will cause the coronal image to transform into a sagittal image. Check the positioning block in the other two planes. In the sagittal plane, use an appropriate angle parallel to the scapular blade. Ensure that the slices adequately cover the entire scapula, from the anterior portion of the coracoid process to the posterior skin margin. To reduce ghosting artifacts caused by breathing, consider adding an oblique saturation band over the chest. For the phase direction, use right to left with sufficient oversampling to prevent wrap-around and ghosting artifacts from the chest.

Parameters

TR

4000-5000

TE

110

FLIP

130

NEX

2

SLICE

3 MM

MATRIX

320X256

FOV

200-250

PHASE

R>L

GAP

10%

TI

150

T2 tse sagittal

Plan the agittal slices on the axial plane and position the block perpendicular to the scapular blade. Verify the positioning block in the other two planes. Provide an appropriate angle in the coronal plane, running vertically across the scapular blade. Ensure that the slices cover the entire scapula, extending from the lateral edge of the deltoid muscle to 1 cm past the medial border of the scapula. To minimize ghosting artifacts caused by breathing, incorporate an oblique saturation band over the chest. Choose the phase direction as either anteroposterior or head to feet, with ample oversampling to prevent wrap-around and ghosting artifacts.

Parameters

TR

4000-5000

TE

110

FLIP

150

NEX

2

SLICE

3MM

MATRIX

320X320

FOV

200-250

PHASE

A>P/H>F

GAP

10%

FATSAT

Off