mrimaster

MRI Urography (Planning and Protocols)

Indications for MRI Urography scan

Contraindications

Patient preparation for MRI Urography scan

Positioning for MRI Urography scan

MRI urography positioning photo

Recommended MRI Urography scan Protocols and Planning

MRI Urography localizer

A three-plane T2 TRIFISP\HASTE localizer must be taken initially to localize and plan the sequences. These are fast single-shot localizers with under 25s acquisition time, which are excellent for localizing vascular structures. Take at least 5-8 slices in all planes to get the best results.

T2 TRUFI \HASTE fat sat axial 4 mm

Plan the axial slices on the coronal plane, angle the positioning block parallel to the right and left iliac crest. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (horizontally across the abdomen). The slices must be sufficient to cover the entire abdomen and pelvis from the diaphragm down to the symphysis pubis. Use a field of view (FOV) that is large enough to encompass the entire abdomen, typically ranging from 350mm to 400mm.

Parameters

TR

4-5

TE

2-3

FLIP

60

NEX

1

SLICE

4 MM

MATRIX

320×256

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

ON

T2 haste axial 4 mm

Plan the axial slices on the coronal plane, angle the positioning block parallel to the right and left iliac crest. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (horizontally across the abdomen). The slices must be sufficient to cover the entire abdomen and pelvis from the diaphragm down to the symphysis pubis. Use a field of view (FOV) that is large enough to encompass the entire abdomen, typically ranging from 350mm to 400mm.

Parameters

TR

1500-2500

TE

100

FLIP

150

NEX

1

SLICE

4 MM

MATRIX

320X320

FOV

400-450

PHASE

A>P

OVERSAMPLE

50%

IPAT

ON

T1 flash FS/ vibe 3D DIXON coronal 2 mm

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired. (In our department, we advise patients to take two breaths in and out before the “breath in and hold” instruction).

Parameters

TR

4-5

TE

3

FLIP

12

NEX

1

SLICE

2 MM

MATRIX

320X320

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T2 haste coronal 3mm

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired. (In our department, we advise patients to take two breaths in and out before the “breath in and hold” instruction).

Parameters

TR

1500-2000

TE

100

FLIP

150

NEX

1

SLICE

3 MM

MATRIX

320X320

FOV

400-450

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T2 HASTE thick 60mm breath hold coronal oblique(single slice)

Plan the coronal slice on the axial plane; angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the ureter). Slice thickness must be sufficient to cover the entire ureters. Phase oversampling must be used to avoid wrap-around artifacts. FOV must be big enough to cover the kidneys and bladder. Instruct the patient to hold their breath during image acquisition.

Parameters

TR

3000-4000

TE

500

FLIP

150

NEX

1

SLICE

60mm

MATRIX

384X320

FOV

400-450

PHASE

R>L

OVERSAMPLE

50%

IPAT

ON

T2 haste thick 60mm breath hold sagittal oblique(single slice) RT

Plan the sagittal slice on the coronal plane; angle the positioning block parallel to the right ureter. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (perpendicular to the right kidney calyx). Slice thickness must be sufficient to cover the whole ureter. Phase oversampling must be used to avoid wrap-around artifacts. The field of view (FOV) must be big enough to cover the kidneys and bladder. Instruct the patient to hold their breath during image acquisition.

Parameters

TR

3000-4000

TE

500

FLIP

150

NEX

1

SLICE

60mm

MATRIX

384X320

FOV

400-450

PHASE

A>P

OVERSAMPLE

50%

IPAT

ON

T2 haste thick 60mm breath hold sagittal oblique(single slice) LT

Plan the sagittal slice on the coronal plane; angle the positioning block parallel to the left ureter. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (perpendicular to the left kidney calyx). Slice thickness must be sufficient to cover the whole ureter. Phase oversampling must be used to avoid wrap-around artifacts. The field of view (FOV) must be big enough to cover the kidneys and bladder. Instruct the patient to hold their breath during image acquisition.

Parameters

TR

3000-4000

TE

500

FLIP

150

NEX

1

SLICE

60mm

MATRIX

384X320

FOV

400-450

PHASE

A>P

OVERSAMPLE

50%

IPAT

ON

Pause for contrast injection

contrast administration and timing of scans

Guess timing technique:-

This method is among the most straightforward techniques, relying on estimating the time it takes for contrast to travel from the injection site to the kidneys’ vascular structure. The success of this technique is closely tied to factors like the injection site, patient age, cardiac output, and vascular anatomy. Typically, it takes around 18-25 seconds for the contrast to travel from the antecubital vein to the abdominal aorta. Consequently, arterial acquisition should commence within 25 seconds of administering the contrast.

T1 flash FS/ vibe 3D DIXON coronal 2 mm arterial 25 seconds

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired. (In our department, we advise patients to take two breaths in and out before the “breath in and hold” instruction).

Parameters

TR

4-5

TE

2

FLIP

12

NEX

1

SLICE

2 MM

MATRIX

320X320

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T1 flash FS/ vibe 3D DIXON coronal 2mm venous 50 seconds

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired.

Parameters

TR

4-5

TE

2

FLIP

12

NEX

1

SLICE

2 MM

MATRIX

320X320

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T1 flash FS/ vibe 3D DIXON coronal 2 mm delayed 5 minutes

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired.

Parameters

TR

4-5

TE

2

FLIP

12

NEX

1

SLICE

2 MM

MATRIX

320X320

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T1 flash FS/ vibe 3D DIXON coronal 2mm delayed 10 minutes

Plan the coronal slices on the axial plane and angle the positioning block parallel to the right and left kidneys. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (parallel to the L spine). Ensure that the slices are sufficient to cover the entire urinary system. Use phase oversampling and, in the case of 3D blocks, slice oversample to avoid wrap-around artifacts. The field of view (FOV) must be large enough to cover the kidneys and bladder. Instruct the patient to hold their breath while the images are being acquired.

Parameters

TR

4-5

TE

2

FLIP

12

NEX

1

SLICE

2 MM

MATRIX

320X256

FOV

350-400

PHASE

R>L

OVERSAMPLE

50%

IPAT

OFF

T1 flash FS/ vibe 3D DIXON axial 3mm delayed

Plan the axial slices on the coronal plane, angle the positioning block parallel to the right and left iliac crest. Check the positioning block in the other two planes. An appropriate angle must be given in the sagittal plane (horizontally across the abdomen). The slices must be sufficient to cover the entire abdomen and pelvis from the diaphragm down to the symphysis pubis. Use a field of view (FOV) that is large enough to encompass the entire abdomen, typically ranging from 350mm to 400mm.

Parameters

TR

4-5

TE

2

FLIP

12

NEX

1

SLICE

3 MM

MATRIX

320X320

FOV

350-400

PHASE

A>P

OVERSAMPLE

50%

IPAT

ON