Diagnostic value of biplanar ultrasonographic assessment in detecting degenerative changes in femoral articular cartilage

Abstract

Aim: The aim of our study was to assess the diagnostic value of biplanar ultrasonography in detecting degenerative changes of femoral articular cartilage using magnetic resonance imaging as the reference method.

Material and Methods: Femoral articular cartilage examination was performed with ultrasonography and magnetic resonance imaging in 40 patients with knee pain. Magnetic resonance imaging of the knees were carried out on a 1.5 T scanner with proton density weighted, fat suppressed sequence in three orthogonal planes. Ultrasonographic evaluations of the knees were performed in both longitudinal and transverse planes. Taking the findings of magnetic resonance imaging as a reference, the diagnostic effectiveness of biplanar US in detecting medial condylar, lateral condylar and intercondylar notch cartilage lesions were calculated.

Results: The sensitivity of biplanar ultrasonography in detecting medial condylar, lateral condylar, and intercondylar notch cartilage lesions were 93.55%, 61.11%, and 53.85%, respectively. The specificity of the technique in detecting the lesions in these locations were 88.89%, 90.91%, and     100.00%, respectively.

 Conclusion: Ultrasonography is a relatively inexpensive, easily accessible and a non-invasive imaging tool. We found that biplanar ultrasonography is a reliable method in detecting medial condylar cartilage lesions in knee osteoarthritis, and we recommend using it for the purposes of screening and follow-up evaluation of medial type knee osteoarthritis where MRI is not accessible.

Keywords

• knee osteoarthritis,cartilage degeneration,ultrasonography

Biplanar ultrasonografik incelemenin femoral artiküler kıkırdaktaki dejeneratif değişiklikleri saptamadaki tanı değeri

Abstract

Amaç: Manyetik rezonans görüntüleme referans alınarak, transvers ve longitudinal yaklaşımların beraber kullanıldığı biplanar ultrasonografik incelemenin, femoral artiküler kıkırdaktaki dejeneratif değişiklikleri saptamadaki tanı değerinin saptanması amaçlandı.

Gereç ve Yöntemler: Diz ağrısı şikayeti olan 40 hastada ultrasonografi ve manyetik rezonans görüntüleme ile femoral artiküler kıkırdak incelemesi yapıldı. Manyetik rezonans görüntüleme, 1.5 T görüntüleyicide her üç ortogonal düzlemde proton dansite ağırlıklı sekans kullanılarak uygulandı. Diz ultrasonografi incelemesi, transvers ve longitudinal planlarda gerçekleştirildi. Manyetik rezonans görüntüleme bulguları referans alınarak biplanar diz ultrasonografi incelemesinin medial kondil, lateral kondil, ve interkondiler çentik lokalizasyonlarındaki kıkırdak lezyonlarını saptamadaki tanısal etkinliği hesaplandı.

Bulgular: Biplanar ultrasonografinin medial kondil, lateral kondil, ve interkondiler çentik lokalizasyonlarındaki lezyonları saptamadaki sensitivitesi aynı sıra ile %93,55, %61,11 ve %53,85, ve spesifisitesi aynı sıra ile %88,89, %90,91 ve %      100,00 bulundu.

Sonuç: Ultrasonografi nispeten ucuz, kolay ulaşılabilir ve noninvaziv bir inceleme yöntemidir.  Biplanar ultrasonografi tekniğinin diz osteoartritindeki medial kondiler kıkırdak lezyonlarını saptamada güvenilir bir inceleme metodu olduğunu saptadık ve medial tip diz osteoartriti taraması ve MRG erişiminin kısıtlı olduğu durumlarda takip değerlendirmesinde kullanımını öneriyoruz.

Keywords

• diz osteoartriti,kıkırdak dejenerasyonu,ultrasonografi

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