Renal arter stenozlarında kontrastlı üç boyutlu manyetik rezonans anjiografi: Dijital subtraksiyon anjiyografi ile karşılaştırma
Contrast-enhanced three-dimensional MR angiography in the diagnosis of renal artery stenosis: Comparison with digital subtraction angiography
- Tez No: 102692
- Danışmanlar: DOÇ.DR. GÜL AYŞE ERDEN
- Tez Türü: Tıpta Uzmanlık
- Konular: Radyoloji ve Nükleer Tıp, Radiology and Nuclear Medicine
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2001
- Dil: Türkçe
- Üniversite: Ankara Üniversitesi
- Enstitü: Tıp Fakültesi
- Ana Bilim Dalı: Radyodiagnostik Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 50
Özet
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Özet (Çeviri)
İNGİLİZCE ÖZET: Renal artery stenosis (RAS) is a treatable cause of hypertension and renal failure for which no ideal screening technique is currently available. We evaluated the diagnostic value of dynamic gadolinium-enhanced MR angiography for the detection of RAS. 26 patients suspected to have RAS with clinical and laboratory findings were enrolled in this study. Number of total renal arteries including the accessory ones and the existence of stenosis were determined with MRA and all findings were compared with DSA which is the gold standart technique for the diagnosis of RAS. A total of 56 renal arteries were visualized by MRA, where 24 of them were found to be stenotic. One false-negative and one false-positive result was encountered with MRA, but all other stenoses were confirmed on DSA. MRA failed to diagnose the stenosis of a low-calibrated accessory renal artery and a signal loss due to dephasing artifact caused by the turbulent flow at the ostium was misspelled as stenosis. According to these findings gadolinium-enhanced renal artery MRA had a sensitivity of 92 %, specificity of 98 % and an accuracy of 96 % when compared with DSA. It is less sensitive in picking up both the accessory renal arteries and accessory renal artery stenoses. Contrast-enhanced renal artery MRA allows accurate evaluation of patients suspected to have renal artery stenosis without the known risks associated with nephrotoxic contrast agents, ionizing radiation or arterial catheterization. It offers many advantages as it is a quick, non invasive, objective screening method in the diagnosis of RAS and is reliable with high sensitivity-spesificity rates. 43
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