Journals / Tanısal ve Girişimsel Radyoloji (Yeni Adı: Dİagnostic & Intervent. Radiol) / 2004 / Cilt: 10 - Sayı: 4

Diagnostic value of haste technique and excretory MR urography in urinary system obstructions

Üriner sistem obstrüksiyonlarında HASTE tekniğinin ve ekskretuar MR ürografinin tanı değeri

Pages
309–315
DOI
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Excretory MRU can supply additional information in cases with functional kidneys where the cause of obstruction can not be revealed by HASTE MRU.

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Objective & Hypothesis:PURPOSE: To compare the diagnostic value of static-liquid magnetic resonance urography (MRU) in T2-weighted HASTE (half-fourier acquisition single-shot turbo spinecho) sequences and T1-weighted excretory MRU with i.v. diuretic and contrast material injection.
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Key Findings & Data:MATERIALS AND METHODS: The study included 29 patients (15 men, 14 women).
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Conclusion & Impact:Excretory MRU can supply additional information in cases with functional kidneys where the cause of obstruction can not be revealed by HASTE MRU.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Ürografi · Hidronefroz · Manyetik rezonans görüntüleme

Abstract

PURPOSE: To compare the diagnostic value of static-liquid magnetic resonance urography (MRU) in T2-weighted HASTE (half-fourier acquisition single-shot turbo spinecho) sequences and T1-weighted excretory MRU with i.v. diuretic and contrast material injection. MATERIALS AND METHODS: The study included 29 patients (15 men, 14 women). Thirty-one urinary obstructions were detected on intravenous urography (IVU) two of which were due to bilateral obstructions. The cases were evaluated by T2 HASTE sequences combined with T1-weighted FLASH 3D sequences after i.v. diuretics and gadolinium DTPA injection. RESULTS: Thirty-one urinary obstructions were detected on IVU. Thirty of which were confirmed by T2-weighted MRU and all were confirmed by excretory MRU. In one nonobstructive case, unilateral grade 1 ureteropelvicaliectasis related to ureteral stone was falsely interpreted by both sequences. There were no statistical differences among IVU, T2-weighted MRU and excretory MRU in detecting the obstruction levels. In 22 cases with ureteral stones, 12 of which were confirmed by T2-weighted MRU and 18 cases were confirmed by excretory MRU. Sensitivity and specificity fo detecting the ureteral stones as a cause of obstruction with T2-weighted MRU were 50%and 89% and with excretory MRU were 77% and 89% respectively. In 9 obstructive cases due to causes other than the stones, 8 of which were detected by T2-weighted MRU and all of which were detected by excretory MRU. Sensitivity and specificity for detecting the causes other than the stones with T2-weighted MRU were 96% and 100% and with excretory MRU were 100% and 100% respectively. CONCLUSION: MRU is a useful thechnique revealing high-quality images to determine the urinary system obstructions to obtain the causes of obstructions. MRU should be used as an alternative imaging technique in cases which IVU can not be applied. The existence and the causes of obstruction can be detected by HASTE MRU. Excretory MRU can supply additional information in cases with functional kidneys where the cause of obstruction can not be revealed by HASTE MRU.

Özet

AMAÇ İntravenöz ürografide (İVÜ) üriner sistem obstrüksiyonu tespit edilen olgularda HASTE sekansında statik-sıvı MR ürografi (MRÜ) ile i.v. diüretikli ve kontrastlı T1A ekskretuar MRÜ uygulayarak tanı değerlerini karşılaştırmayı amaçladık. GEREÇ VE YÖNTEM Çalışmaya 14’ü kadın, 15’i erkek toplam 29 olgu alındı. İVÜ’de, ikisinde bilateral olmak üzere toplam 31 adet üriner obstrüksiyon vardı. İVÜ ile tespit edilen üriner obstrüksiyonlu olgulara HASTE sekansı ile ağır T2A görüntüleme ve i.v. diüretik ve gadolinyum DTPA verilerek T1A FLASH 3D sekansı uygulandı. BULGULAR T2A MRÜ 31 adet üriner obstrüksiyonun 30’unda, ekskretuar MRÜ ise tamamında obstrüksiyon varlığını gösterdi. İVÜ’ de tek taraflı taşa bağlı üriner obstrüksiyonu olan bir olguda ise hem T2A MRÜ hem de ekskretuar MRÜ bilateral taşa bağlı derece 1 üreteropelvikaliektazi gösterildi. Obstrüksiyon seviyelerinin tespiti açısından İVÜ ile T2A MRÜ ve ekskretuar MRÜ arasında istatistiksel olarak anlamlı fark saptanmadı. Üreter taşı tanısı alan 22 olgunun 12’sinde T2A MRÜ’de, 18’inde ekskretuar MRÜ’de taş tanısı kondu. T2A MRÜ’nün üreter taşlarına doğru tanı koymadaki duyarlılığı %50, özgüllüğü %89, ekskretuar MRÜ’nün ise duyarlılığı ve özgüllüğü sırasıyla %77, %89 olarak bulundu. Taş dışı nedenlerle meydana gelen 9 adet üriner obstrüksiyonun T2A MRÜ 8’inde, ekskretuar MRÜ ise tamamında obstrüksiyon nedenini doğru tespit etti. Taş dışı nedenlerle meydana gelen obstrüksiyonların gösterilmesinde T2A MRÜ’nün duyarlılığı %96, özgüllüğü %100, ekskretuar MRÜ’nün ise duyarlılığı ve özgüllü ğü %100 olarak bulundu. SONUÇ MRÜ üriner sistem ostrüksiyonlarının tespitinde kaliteli görüntüler sağlayan bir yöntemdir. İVÜ’nün kullanılamadığı durumlarda alternatif olarak da kullanılabilir. HASTE MRÜ sekansı nonfonksiyone böbreklerde obstrüksiyonun varlığını ve nedenini kolaylıkla saptayabilir. Bu teknikle obstrüksiyon nedeninin gösterilemediği durumlarda, fonksiyone böbreklerde ekskretuar MRÜ obstrüksiyon nedenini gösterme bakımından ilave bilgiler sağlayabilir.

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Cite This Article

ERDOĞMUŞ, B., BOZKURT, M., BAKIR, Z. (2004). Diagnostic value of haste technique and excretory MR urography in urinary system obstructions. Tanısal ve Girişimsel Radyoloji (Yeni Adı: Dİagnostic & Intervent. Radiol), Cilt: 10 - Sayı: 4, 309–315. https://ajindex.com/articles/364261

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