mrimaster

MRI Middle Finger : Protocol and Planning

Indications for middle finger MRI scan

Contraindications

Patient preparation for MRI Middle Finger

Positioning for MRI Middle Finger

MRI hand positioning

Recommended MRI Middle Finger Protocols and Planning

Localiser

A three-plane localizer must be taken at the beginning to localize and plan the sequences. Typically, these localizers take less than 25 seconds and can be achieved using T1 weighted low-resolution scans. It is advisable to obtain additional localizers until you have acquired accurate axial, coronal, and sagittal localizer images.

MRI thumb localiser image

T2 stir axial 3mm SFOV(70mm)

Plan the axial slices on the coronal localizer and position the planning block perpendicular to the phalangeal bones. Check the positioning block in the other two planes. Use an appropriate angle in the sagittal localizer, ensuring it is perpendicular to the phalangeal bones. The slices should be sufficient to cover the entire middle finger, from the fingertips to the metacarpophalangeal joint

MRI middle finger protocol and planning of axial SFOV scans

Parameters

TR

5000-6000

TE

110

FLIP

150

NEX

3

SLICE

3MM

MATRIX

224×224

FOV

70-80

PHASE

A>P

GAP

10%

TI

160

Note:-An FOV ranging from 70mm to 80mm can only be achieved when utilizing a specialized high-channel wrist coil or conducting the scan within a 3T scanner. In cases where these choices are unavailable within your department, kindly opt for an FOV between 110mm and 130mm. The presented scans were executed using a 3T scanner equipped with deep resolution software.

T1 tse axial 3mm SFOV(70mm)

Plan the axial slices on the coronal localizer and position the planning block perpendicular to the phalangeal bones. Check the positioning block in the other two planes. Use an appropriate angle in the sagittal localizer, ensuring it is perpendicular to the phalangeal bones. The slices should be sufficient to cover the entire middle finger, from the fingertips to the metacarpophalangeal joint

MRI middle finger protocol and planning of axial SFOV scans

Parameters

TR

400-600

TE

15-25

SLICE

3 MM

FLIP

150

PHASE

A>P

MATRIX

256X240

FOV

70-80

GAP

10%

NEX(AVRAGE)

3

T1 tse coronal 2mm SFOV(80X160mm)

Plan the coronal slices on the axial plane, angling the positioning block parallel to the line across the phalangeal bones. Check the positioning block in the other two planes. An appropriate angle must be used in the sagittal plane, parallel to the phalangeal bones. The slices must be sufficient to cover the entire middle finger from the dorsal to palmar aspect. If available on your scanner, please use a smaller rectangular FOV of 80x160mm. In this case, use a phase direction from head to feet. If a rectangular FOV is not available, use a 160mm FOV with a right-to-left phase direction.

MRI middle finger protocol and planning of coronal SFOV scans

Parameters

TR

400-600

TE

15-25

SLICE

2 MM

FLIP

160

PHASE

H>F

MATRIX

288X256

FOV

80×160

GAP

10%

NEX(AVRAGE)

3

T2 stir coronal 2mm SFOV(80X160mm)

Plan the coronal slices on the axial plane, angling the positioning block parallel to the line across the phalangeal bones. Check the positioning block in the other two planes. An appropriate angle must be used in the sagittal plane, parallel to the phalangeal bones. The slices must be sufficient to cover the entire middle finger from the dorsal to palmar aspect. If available on your scanner, please use a smaller rectangular FOV of 80x160mm. In this case, use a phase direction from head to feet. If a rectangular FOV is not available, use a 160mm FOV with a right-to-left phase direction.

MRI middle finger protocol and planning of coronal SFOV scans

Parameters

TR

3000-4000

TE

110

FLIP

150

NEX

3

SLICE

2 MM

MATRIX

256X224

FOV

80×160

PHASE

H>F

GAP

10%

TI

160

T2 stir sagittal 2mm SFOV(160X60mm)

Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the phalangeal bones. Check the positioning block in the other two planes. An appropriate angle must be used in the axial plane (perpendicular to the long axis of the phalangeal bones). The slices must be sufficient to cover the middle finger from the medial aspect to the lateral aspect.

MRI middle finger protocol and planning of sagittal SFOV scans

Parameters

TR

3000-4000

TE

110

FLIP

150

NEX

3

SLICE

2 MM

MATRIX

256X256

FOV

160×60

PHASE

H>F

GAP

10%

TI

160