mrimaster

Wrist MRI Protocol and Planning

Indications for wrist MRI scan

Contraindications

Patient preparation for Wrist MRI

Positioning for Wrist MRI

MRI wrist positioning

Recommended Wrist MRI Protocol Protocols and Planning

Localiser

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

PD fat saturated axial 3mm SFOV

Plan the axial slices on the coronal plane; angle the positioning block horizontally across the wrist joint (i.e. across the carpal bones). Check the positioning block in the other two planes. An appropriate angle must be used in the sagittal plane (horizontally across the wrist joint). The slices should adequately cover the entire wrist area, from 1 inch above the carpo-metacarpal joint to 1 inch below the distal radioulnar joint. To mitigate vascular pulsation artifacts, employ saturation bands above and below the axial block.

mri wrist planning of axial images

Parameters

TR

3000-4000

TE

15-25

FLIP

150

NEX

2

SLICE

3 MM

MATRIX

288X288

FOV

100-110

PHASE

R>L

GAP

10%

oversample

30%

T2 stir coronal 3mm SFOV

Plan the coronal slices on the axial plane; angle the positioning block horizontally across the carpal bones. Verify the alignment of the positioning block in the other two planes. Utilize an adequate vertical angle in the sagittal plane to cover the wrist joint comprehensively from dorsal to palmar aspects. Additionally, implement saturation bands above and below the axial block to minimize vascular pulsation artifacts.

Parameters

TR

3000-4000

TE

110

FLIP

130

NEX

2

SLICE

3MM

MATRIX

256X256

FOV

110-120

PHASE

H>F

GAP

10%

TI

130

T1 tse coronal 3mm SFOV

Plan the coronal slices on the axial plane; angle the positioning block horizontally across the carpal bones. Verify the alignment of the positioning block in the other two planes. Utilize an adequate vertical angle in the sagittal plane to cover the wrist joint comprehensively from dorsal to palmar aspects. Additionally, implement saturation bands above and below the axial block to minimize vascular pulsation artifacts.

Parameters

TR

400-600

TE

15-25

SLICE

3 MM

FLIP

130

PHASE

R>L

MATRIX

320X320

FOV

110-120

GAP

10%

NEX(AVRAGE)

2

PD fat saturated coronal 3mm SFOV

Plan the coronal slices on the axial plane; angle the positioning block horizontally across the carpal bones. Verify the alignment of the positioning block in the other two planes. Utilize an adequate vertical angle in the sagittal plane to cover the wrist joint comprehensively from dorsal to palmar aspects. Additionally, implement saturation bands above and below the axial block to minimize vascular pulsation artifacts.

Parameters

TR

3000-4000

TE

15-25

FLIP

150

NEX

2

SLICE

3 MM

MATRIX

288X288

FOV

100-110

PHASE

R>L

GAP

10%

oversample

100%

PD fat saturated sagittal 3mm SFOV

Plan the sagittal slices on the axial plane and angle the positioning block vertically across the carpal bones. Check the positioning block in the other two planes, ensuring an appropriate angle is used in the coronal plane, crossing the carpal bones vertically. The slices should sufficiently cover the entire wrist from medial to lateral aspects. The phase direction in the sagittal scans must be head to feet with 100% oversample to avoid artifacts from radial and ulnar artery pulsation. The use of saturation bands above and below the sagittal block will reduce radial and ulnar artery pulsation artifacts.

Parameters

TR

3000-4000

TE

15-30

FLIP

150

NEX

2

SLICE

3MM

MATRIX

288X288

FOV

100-110

PHASE

H>F

GAP

10%

OVERSAMPLE

100%