1. Ali Akbar Ameri – M.D. Jalal Jalal Shokouhi – M.D.
MRU
Ali Akbar Ameri – M.D.
Jalal Jalal Shokouhi – M.D.
Jaam-e-jam medical imaging center

2. MRU,EMRU
High sensitivity to water signal
MRU + lasix : anatomic
EMRU + GD + lasix : physiologic ,functional

3. ADVANTAGES No radiation Contrast sensitivity Young peoples
Fetus, pregnancy

4. INDICATIONS Hydronephrosis Stone
Obstructions “stone,pelvic masses,UB masses”
Renal transplanation
Renal insuficiency

5. Matherial and Method Machine: 1.5 , 1 tesla
Heavy T2 , Coronal-thick slab
stationary fluid = CSF , Bile , Urine , Bowel: white
Flowing fluid = vessels: black

6. ACCURACY MRU>IVU Urinary obstruction in insuficcency
MRU>IVU UB cancer
MRU=IVU Normal population
MRU=IVU Degree of hydronephrosis
MRU>IVU Hydronephrosis and serial imaging
MRU<IVU Small stone and partial obstruction
Spiral CT +/- CM > IVU, MRU stone and small or partial obstruction
IVU,EMRU > MRU ureter and pyelosinus rupture

7. PULSE
Heavy T2 thick slab ,fat saturation (HF T2 : half –fourier-T2, MIP) TR=8000
HASTE , SSFSE coronal mm ,1-2 respiration stop
RARE : images , coronal thick slab , respiratory stop
EMRU : 1mg /kg max. 10 mg lasix , seconds before GD MIP T1 and T2
SPOILED GRE – T1
3D FAT SAT. – T1
MIP : under 45 Flip angle
Delayed images if obstruction

8. RESULTS AND PATHOLOGIC CASES

9. Fetus a) normal 1 case
b) hydronephrosis 2 cases
c) posterior uretheral valve 1 case
Non specific hydronephrosis 33 cases
Pelvic mass and hydronephrosis 3 cases
Stone and hydronephrosis 3 cases
Vascular impression on ureter 2 case
UPJ stenosis 5 cases
Ureterocele 3 cases

10. Horse shoe kidney 2 cases Non functional kidney (unilateral) 7cases
Small kidney 2 cases
UB diverticula's 2 cases
Horse shoe kidney 2 cases
Non functional kidney (unilateral) 7cases
Double collecting system 3 cases
Delicate fluid around kidney 2 cases
Neurogenic bladder 2 cases
Others from 150 patients was normal(3 years duration)