TY  - JOUR
T1  - 1940 NM FİBER LAZER KAYNAĞININ KARACİĞER DOKUSUNDAKİ ISIL HASARININ YAPAY SİNİR AĞLARI İLE TAHMİNİ
TT  - Prediction of 1940 nm Fiber Laser Induced Thermal Damage Using Artificial Neural Networks
AU  - Yıldız, Fikret
PY  - 2019
DA  - August
Y2  - 2019
DO  - 10.17482/uumfd.410963
JF  - Uludağ Üniversitesi Mühendislik Fakültesi Dergisi
JO  - UUJFE
PB  - Bursa Uludağ University
WT  - DergiPark
SN  - 2148-4155
SP  - 583
EP  - 594
VL  - 24
IS  - 2
LA  - tr
AB  - Buçalışmada Yapay Sinir Ağları (YSA) yöntemi kullanılarak 1940 nm dalgaboyunasahip lazer kaynağının karaciğer dokusu üzerinde oluşturduğu ısıl hasarların güçve uygulama süreleri ile arasındaki ilişkisi incelenmiştir. Farklı güçdeğerlerine sahip lazer kaynağı koagülasyon ve karbonizasyon gözlenene kadar dokuyafarklı sürelerde uygulanmıştır. Buna bağlı olarak radyal ve düşey yönde oluşanısıl hasarlar deneysel olarak ölçülmüş ve kayıt altına alınmıştır. Bukayıtların %70’i Matlab ortamında geliştirilen YSA modellerini eğitmek içinkullanılmıştır. Lazer gücü ve uygulama süreleri model için giriş verileri,koagülasyon/karbonizasyon oluşma durumu ve oluşan ısıl hasarlar ise (çap,derinlik) modelin çıkış değerleri olarak kabul edilmiştir. Giriş verilerikullanılarak beş farklı öğrenme (LM, GDA, GDX, CGP ve BFG) algoritmasının enküçük kareler değeri (MSE) hesaplanmıştır ve karşılaştırılmıştır. Gizlikatmanında 14 tane nörona sahip GDX, 2-14-3 yapısı, en iyi MSE (7.58E-2)sonucunu vermiştir ve eğitimde kullanılmayan veriler ile bu algoritmanın tahminetme performansını test etmek için kullanılmıştır. Geliştirilen modelin nekadar iyi çalıştığını anlamak için YSA tarafından tahmin edilen sonuçlar,deneysel sonuçlar ile karşılaştırılmıştır. Minimum %2.7 ve % 3.6 hata oranı ile dokuda oluşan ısıl çapve derinliklerinin tahmin edilebileceği gösterilmiştir. Bu sonuçlara göre,medikal uygulamalarda YSA yönteminin lazere yardımcı bir araç olarak kullanılması,çevre dokuların korunarak istenilen hedef bölgenin daha kontrollü ve dahayüksek doğrulukla tedavisini mümkün kılabilir.
KW  - Yapay Sinir Ağları (YSA)
KW  - Koagülasyon
KW  - Karbonizasyon
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UR  - https://doi.org/10.17482/uumfd.410963
L1  - https://dergipark.org.tr/en/download/article-file/819844
ER  -