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MRU

MRU. Ali Akbar Ameri – M.D. Jalal Jalal Shokouhi – M.D. aa_ameri@yahoo.com jalaljalalshokouhi@hotmail.com. Jaam-e-jam medical imaging center. MRU,EMRU High sensitivity to water signal MRU + lasix : anatomic EMRU + GD + lasix : physiologic ,functional. ADVANTAGES. No radiation

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MRU

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  1. MRU Ali Akbar Ameri – M.D. JalalJalalShokouhi – M.D. aa_ameri@yahoo.com jalaljalalshokouhi@hotmail.com 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>IVUUrinary obstruction in insuficcency MRU>IVUUB cancer MRU=IVUNormal population MRU=IVUDegree of hydronephrosis MRU>IVUHydronephrosis and serial imaging MRU<IVUSmall stone and partial obstruction Spiral CT +/- CM > IVU, MRU stone and small or partial obstruction IVU,EMRU > MRUureter and pyelosinus rupture

  7. PULSE Heavy T2 thick slab ,fat saturation (HF T2 : half –fourier-T2, MIP) TR=8000 HASTE , SSFSE coronal 3-6 mm ,1-2 respiration stop RARE : 20-60 images , coronal thick slab , respiratory stop EMRU : 1mg /kg max. 10 mg lasix , 30-60 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. 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)

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