mrimaster

Rectovaginal(RV) Fistula MRI Protocol and Planning

Indications for anovaginal and rectovaginal fistula mri

Contraindications

Patient preparation for rectovaginal fistula mri

Positioning for rectovaginal fistula mri

mri female urethra positioning photo

Recommended MRI Rectovaginal Fistula Protocols and Planning

localiser

A three-plane localizer must be taken at the beginning to localize and plan the sequences. Typically, localizers require less than 25 seconds and consist of T1/T2 weighted low-resolution scans. Additional localizers should be taken until a proper axial, coronal, and sagittal view of the rectovaginal area is achieved.

pelvis RV fistula localizer image

T2 tse sagittal 3mm

Plan the sagittal slices on the coronal plane; angle the planning block parallel to the vagina (i.e., parallel to the interpubic fibrocartilage). Check the planning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the interpubic fibrocartilage and the anal canal). Slices must be sufficient to cover the pelvis from the right acetabulum to the left acetabulum.

Parameters

TR

3000-4000

TE

100-120

SLICE

3 MM

FLIP

130-150

PHASE

H>F

MATRIX

320X320

FOV

250-300

GAP

10%

NEX(AVRAGE)

2

T2 stir sagittal 3mm small fov

Plan the sagittal slices on the coronal plane and angle the planning block parallel to the vaginal canal (i.e., parallel to the interpubic fibrocartilage). Check the planning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the line along the interpubic fibrocartilage and the anal canal). The slices should adequately cover the pelvis from the right acetabulum to the left acetabulum. Utilize a small FOV to achieve a high-resolution scan of the rectovaginal area, typically ranging from 150 to 200.

Parameters

TR

3000-4000

TE

110

FLIP

130

NEX

4

SLICE

3MM

MATRIX

256X256

FOV

150-200

PHASE

H>F

GAP

10%

TI

130

T2 tse fat sat (or stir)axial oblique 3mm small fov

Plan the axial slices on the sagittal plane and angle the planning block perpendicular to the vaginal canal. Check the planning block in the other two planes. An appropriate angle must be given in the coronal plane (perpendicular to the vaginal canal). The slices must be sufficient to cover the entire vaginal canal from 1 cm above the cervix down to 1 cm below the anal opening. The FOV (Field of View) must be small to produce a high-resolution scan of the rectovaginal area (usually 150 to 200).

mri pelivis fistula axial planning

Parameters

TR

5000-6000

TE

110

FLIP

130

NEX

5

SLICE

3 MM

MATRIX

256X256

FOV

150-200

PHASE

R>L

GAP

10%

FAT SAT

SPAIR

T2 tse fat sat (or stir)coronal oblique 3mm small fov

Plan the coronal slices on the sagittal plane and angle the planning block parallel to the vaginal canal. Check the planning block in the other two planes. An appropriate angle must be given in the axial plane (horizontally across the vagina). Slices must be sufficient to cover the whole rectovaginal area from the pubic symphysis to the sacrum. The field of view (FOV) must be small to produce a high-resolution scan of the rectovaginal area (normally 150 to 200).

mri pelivis fistula coronal planning

Parameters

TR

5000-6000

TE

110

FLIP

130

NEX

5

SLICE

3 MM

MATRIX

256X256

FOV

150-200

PHASE

R>L

GAP

10%

FAT SAT

SPAIR