Coregistration of MRI and real-time ultrasound enables sonographic localization of breast lesions detected at MRI only. VNT is a feasible alternative to MRI-guided biopsy of ultrasound-occult breast lesions.
The volume navigation technique is an accurate method for coregistration of CE-MRI and sonographic images, enabling lesion localization within a limited volume.
Background An important difficulty regarding the Breast Imaging Reporting and Data System (BI-RADS) category 3 assessment is the need for extensive diagnostic workup and an additional 6-month follow-up study. Purpose To evaluate the feasibility of the BI-RADS category 3 assessments at opportunistic screening. Material and Methods Mammography charts of 9062 screening patients in a major teaching hospital situated in an urban setting of a developing country were evaluated retrospectively (1997-2010). BI-RADS category 3 patients, called for a 6-month follow-up, which comprised a single-view spot or magnification mammogram. The length of follow-up period, compliance to periodic mammographic surveillance, cancer detection rate, and negative predictive values of category 3 assessments were calculated. Results Of the screened population, 9.2% were assigned BI-RADS category 3, and 31.2% of these cases were lost to follow-up. The mean follow-up period for 606 patients was 36.9 months. The negative predictive values for 6-month, 12-month, and final control studies were 90.9%, 87.5%, and 100%, respectively. Patient compliance for 6 months, 12 months, and any control evaluations beyond 12 months was low (50.0%, 29.8%, and 47.5%, respectively). Cancer detection rate was 0.8%. Conclusion Results of the study supports the feasibility of the BI-RADS category 3 assessments at opportunistic screening without any additional diagnostic workup. The practice of category 3 assessment following screening mammograms may be a more cost-effective method for developing countries with high recall rates and low resources in eliminating the maximum risk with minimum cost within the limits of available resources.
Bu analizleri kullanarak tarama mamografi uygulamalarımızı denetledik. Sonuçlar ACR BI-RADS önerileri ve performans kriterlerine göre değerlendirildi.Bulgular: Meme kanseri öyküsü bulunmayan kadınlara yapılan tarama mamografisi sayısı toplam 2413'tü. Pozitif Öngörü Değeri (PÖD)1, PÖD2 ve PÖD3 hesaplamalarımız sırasıyla %5,6, %30,8 ve %52,9 idi. Geri çağırma oranı ise %11' di. Kanser saptama oranı, minimal kanser oranı, erken evre kanser oranı ve lenf nodu negatifliği çıktıları sırasıyla %0,74, %50, %77 ve %64 olarak saptandı.Sonuç: Tarama mamografilerinin değerlendirme çıktılarının ACR performans kriterleri ile uyumlu olduğu görüldü. Erken evre meme kanseri saptama oranı istenildiği gibi yüksek olmasına rağmen aksiller lenf nodu negatiflik oranının istenilen %75'lik oranın altında kaldığı görüldü. Medikal denetleme, meme görüntüleme biriminin tarama ve tanı çalışmalarının etkinliğini gösterme ve birimin uygulamalarının iyileşmesi için etkili bir geri bildirim yöntemi olması açısından önemlidir.
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