mrimaster

MRI Female Urethra

Indications for MRI urethra scan

Contraindications

Patient preparation for MRI Female Urethra scan

Positioning for MRI Female Urethra scan

mri female urethra positioning photo

Recommended Female Urethra MRI Protocols and Planning

MRI Female Urethra scan localiser

Take a three-plane localizer at the beginning to localize and plan the sequences. Localizers are usually completed in less than 25 seconds, and they are T1/T2-weighted low-resolution scans. Take additional localizers if needed.

T2 tse axial 5 mm big fov

Plan the large FOV axial slices on the coronal plane; angle the positioning block parallel to the line along the right and left hip joint. Verify the positioning block in the other two planes. Establish an appropriate angle horizontally across the pelvis in the sagittal plane. The slices should be sufficient to cover the entire pelvis from the iliac crest down to two slices below the symphysis pubis. The FOV should be large enough to cover the whole pelvis (normally 350mm-400mm). Additionally, adding saturation bands on top of the axial block will reduce artefacts from arterial pulsation and breathing.

Parameters

TR

4000-5000

TE

100-120

SLICE

5 MM

FLIP

130-150

PHASE

A>P

MATRIX

384X384

FOV

350-400

GAP

10%

NEX(AVRAGE)

2

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

Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the urethra (i.e., parallel to the interpubic fibrocartilage). Plan the sagittal slices on the coronal plane, positioning the block parallel to the urethra (i.e., parallel to the interpubic fibrocartilage). Verify the positioning block in the other two planes. Establish an appropriate angle in the axial plane (parallel to the interpubic fibrocartilage to the anal canal). Ensure that the slices cover the entire urethra from right to left. Use a smaller FOV around 130-150mm. To reduce artefacts from arterial pulsation, peristalsis, and breathing, add saturation bands on top and in front of the sagittal block.

Parameters

TR

5000-6000

TE

110

FLIP

160

NEX

5

SLICE

3MM

MATRIX

224X208

FOV

130-150

PHASE

A>P

GAP

10%

FATSAT

SPAIR

T2 tse sagittal 3mm small fov

Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the urethra (i.e., parallel to the interpubic fibrocartilage). Plan the sagittal slices on the coronal plane, positioning the block parallel to the urethra (i.e., parallel to the interpubic fibrocartilage). Verify the positioning block in the other two planes. Establish an appropriate angle in the axial plane (parallel to the interpubic fibrocartilage to the anal canal). Ensure that the slices cover the entire urethra from right to left. Use a smaller FOV around 130-150mm. To reduce artefacts from arterial pulsation, peristalsis, and breathing, add saturation bands on top and in front of the sagittal block.

Parameters

TR

3000-4000

TE

110

FLIP

160

NEX

4

SLICE

3MM

MATRIX

256X224

FOV

120-150

PHASE

A>P

GAP

10%

FATSAT

OFF

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

Plan the axial slices on the sagittal plane; angle the positioning block perpendicular to the urethra. Check the positioning block in the other two planes. An appropriate angle must be given in the coronal plane (perpendicular to the urethra). The slices must be sufficient to cover the whole urethra from the mid-urinary bladder down to 1 inch below the opening of the urethra. Use a smaller FOV around 130-150mm. Adding saturation bands on top and in front of the axial block will reduce artifacts from arterial pulsation, peristalsis, and breathing.

Parameters

TR

4000-5000

TE

110

FLIP

160

NEX

4

SLICE

3MM

MATRIX

224X208

PHASE

A>P

GAP

10%

FATSAT

SPAIR

T2 tse axial oblique 3mm small fov

Plan the axial slices on the sagittal plane; angle the positioning block perpendicular to the urethra. Check the positioning block in the other two planes. An appropriate angle must be given in the coronal plane (perpendicular to the urethra). The slices must be sufficient to cover the whole urethra from the mid-urinary bladder down to 1 inch below the opening of the urethra. Use a smaller FOV around 130-150mm. Adding saturation bands on top and in front of the axial block will reduce artifacts from arterial pulsation, peristalsis, and breathing.

Parameters

TR

3000-4000

TE

110

FLIP

160

NEX

4

SLICE

3MM

MATRIX

256X224

PHASE

A>P

GAP

10%

FATSAT

OFF

T1 tse fat sat axial oblique 3mm small fov

Plan the axial slices on the sagittal plane; angle the positioning block perpendicular to the urethra. Check the positioning block in the other two planes. An appropriate angle must be given in the coronal plane (perpendicular to the urethra). The slices must be sufficient to cover the whole urethra from the mid-urinary bladder down to 1 inch below the opening of the urethra. Use a smaller FOV around 130-150mm. Adding saturation bands on top and in front of the axial block will reduce artifacts from arterial pulsation, peristalsis, and breathing.

Parameters

TR

400-500

TE

15-20

FLIP

130

NEX

5

SLICE

3MM

MATRIX

224X224

PHASE

A>P

GAP

10%

FATSAT

ON

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

Plan the coronal slices on the sagittal plane; angle the positioning block parallel to the urethra. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the right and left ischial tuberosities). The slices must be sufficient to cover the whole urethra from mid symphysis pubis to mid rectum. Adding saturation bands on top and in front of the coronal block will reduce artifacts from arterial pulsation, peristalsis, and breathing.

mri female urethra t2 coronal small fov image

Parameters

TR

4000-5000

TE

110

FLIP

150

NEX

2

SLICE

3 MM

MATRIX

224X224

PHASE

R>L

GAP

10%

FAT SAT

SPAIR

Very rarely some urethra scans needed contrast enhanced imaging. In case of contrast enhanced imaging use T1 TSE fat saturated small FOV axial and coronal obliques after the administration of IV gadolinium DTPA injection(copy the planning outlined above). The document below provides access to the recommended dosage of gadolinium DTPA injection, as advised by the manufacturer.