Mamografide Meme Mikrokalsifikasyonları için Otomatik Bilgisayar Destekli Tespit (CADe) ve Tanı (CADx) Sistemi

Yıl 2018, Cilt: 6 Sayı: 3, 355 - 376, 01.09.2018

Burçin Kurt Vasif V. Nabiyev , Kemal Turhan

https://doi.org/10.15317/Scitech.2018.138

Öz

Mamografide mikrokalsifikasyon (MC) kümelerinin saptanması için otomatik bir bilgisayar destekli

tanı sistemi önerilmiştir. Önerilen sistem şüpheli bölgelerin tanımlanması, MC'lerin tespiti, yanlış pozitif

indirgeme ve iyi huylu/kötü huylu sınıflamayı içeren bütün bir sistemdir. Şüpheli mikrokalsifikasyon

bölgelerinin sınıflandırılması için, gri seviye eş-oluşum matrisi (GLCM) ve istatistiksel özellikler ile çok

tabakalı bir perceptron (MLP) sinir ağı kullanıldı. Daha sonra, yanlış pozitif sınıflandırma oranını

azaltmak için, gri seviye çalışma uzunluğu matrisi (GLRLM) özellikli kademeli korelasyon sinir ağı

(CCNN) kullanılmıştır. Son adımda, tespit edilen MC kümelerinin iyi huylu/kötü huylu sınıflandırması

için GLRLM özellikleri ile hibrid yapıda diskriminant analizi ve destek vektör makinesi (SVM)

yöntemleri kullanıldı. Çalışma için açık erişimli Mamografik Görüntü Analizi Derneği (MIAS) veri

tabanı kullanılmıştır. Deneysel sonuçlar, önerilen algoritmanın meme kanseri tespiti için %86 duyarlılık,

%98.3 özgüllük ve 1.163 FPpI oranları elde ettiğini ve meme kanseri tanısı için elde edilen duyarlılık ve

özgüllük değerlerinin sırasıyla %100 ve %100 olduğunu ortaya koymuştur. MC kümelenmelerinin

görme zorluğu olsa da, önerilen sistem çok tatmin edici sonuçlar vermektedir. Bununla birlikte, gelişmiş

sistem; çıktıları yüzdeler ve dönüştürülmüş değerlendirme kategorileri olarak veren tam otomatik bir

bütün sistemdir.

Anahtar Kelimeler

Meme kanseri, Bilgisayar destekli tanı, Kademeli korelasyon sinir ağı (CCNN), Gri seviye eş-oluşu matrisi (GLCM), Gri seviye çalışma uzunluğu matrisi (GLRLM), Mamografi

AN AUTOMATED COMPUTER-AIDED DETECTION (CADe) AND DIAGNOSIS (CADx) SYSTEM FOR BREAST MICROCALCIFICATIONS IN MAMMOGRAMS

Öz

An automated computer aided diagnosis system has been proposed for detection of

microcalcification (MC) clusters in mammograms. The proposed system is a whole system including

suspicious regions identification, MCs detection, false positive reduction and benign/malign

classification. For classification of suspicious microcalcification regions, a multilayer perceptron (MLP)

neural network was used with grey level co-occurrence matrix (GLCM) and statistical features. Then to

decrease the false positive classification ratio, we used cascade correlation neural network (CCNN) with

grey level run length matrix (GLRLM) features. In the last step, hybrid form of discriminant analysis and

support vector machine (SVM) methods were used with GLRLM features for benign/malign

classification of detected MC clusters. The open access Mammographic Image Analysis Society (MIAS)

database was used for the study. Experimental results show that the proposed algorithm obtained 86%

sensitivity, 98.3% specificity and 1.163 FPpI rates for detection an for diagnosis of breast cancer, the

obtained sensitivity and specificity values are 100% and 100% respectively. Despite the vision difficulty

of MC clusters, the novel system provides very satisfactory results. Furthermore, the developed system

is fully automatic whole system which gives outputs as percentages and transformed assessment

categories.

Anahtar Kelimeler

Breast cancer, Computer aided diagnosis, Cascade correlation neural network (CCNN), Grey level cooccurrence matrix (GLCM), Grey level run length matrix (GLRLM), Mammograms

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