Lung Cancer Diagnosis by Using Fuzzy Logic

Lung cancer is one of the most serious cancers in the world, with the smallest survival rate after the diagnosis, with gradual increase in number of deaths every year. Lung cancer is cause due to uncontrolled growth of abnormal cells in one or both lungs. The best way to protection from this danger disease is to detect it early, the early detection gives higher chance of successful treatments. The detection of lung cancer in early stage is difficult because the cancer cells cause many dangerous effect due to their overlapped structure. In this paper we proposed a diagnosis system to detect lung cancer based on fuzzy logic and neural network, we have used neural network to classify the normal and abnormal images , in the abnormal result , we use other parameters (symptoms) as input to fuzzy logic system to find the case of the patient (effected or not) depending on the membership function of inputs like 'smoking', 'persistent', 'coughing', 'coughing up blood', 'hoarseness of voice,', chain pain', 'etc. several images was used and good results has been satisfied. KeywordComputed Tomography(CT),lung cancer, fuzzy, GLCM. 1-Introduction Lung cancer is considered to be the main cause of cancer death worldwide, and in its early stages it is difficult to detect because only in the advanced stage symptoms appear causing the mortality rate to be the highest among all other types of cancer. Lung cancer is cause due to uncontrolled growth of abnormal cells in one or both lungs. Lung cancer is a malignant lung tumor Characterized by uncontrolled cell growth in tissues of lung, if its missed with any treatment, this growth can be spread away from lung in a process called metastasis into nearby tissue of chest or other parts of the body. Most lung cancer have already spread widely and are at advance stage when they are first found, these cancers are very hard to cure .Computed tomography scan (CT) can be used to show lung tumor than routine chest x-rays, aCT scan can also provide precise information about the size ,shape and position of any lung tumors and can help find enlarged lymph nodes that may contain cancer that has spread from the lung. This image can be modified to get better information and to isolate the region of interest to help in diagnosis the disease, then there are several processing operation can be used on this image such as image capture, image enhancement, which increase the necessary details that can be differentiate the strange part from the image, and segmentation such as binarization ,watershed that can be used to divide the image into its constituent region or object. It is used to simplifying or change the representation of the image into something that is more meaningful and easier to analysis, the features Aqeel Mohsin Hamad, International Journal of Computer Science and Mobile Computing, Vol.5 Issue.3, March2016, pg. 32-41 © 2016, IJCSMC All Rights Reserved 33 extraction stage is to extract the properties of the image such as entropy, correlation e.t.c to be the input to the classification stage which have two classifier, first is neural network that is used to detect the normal and abnormal image, while the second classifier is fuzzy inference system that can be used to determine the stage of cancer by use the symptoms of the disease as inputs for the system [1][2]. 2-Related Work In 2012, S.A.PATIL and M.B.Kuchanur used the texture feature extraction process that is applied on chest xray image for small cell and non small cell types, the identifying features are obtained using image processing , then they are applied these feature to expert system to classify the lung cancer. The features that is used in this work was the geometrical features such as area, perimeter, diameter and irregular index, also they are used the first and second order statics features [3]. In 2013, Ada and Rajneet are proposed a methodology work based on binarization approach and gray level co-occurrence method to predict the probability of lung cancer presence .They are used principle component analysis(PCA)to standardize the data in image, also in this work supervised feed forwarded back propagation neural network was used as classifier tool , survival rate measure how many people remain alive with lung cancer after contain amount of time, a five year survival rate 40% for condition would mean that 40%of people , or 40 out of 100 people will be alive after five years [4]. In 2014, Mr.Vijay A.Gajdhane and prof.Deshponde L.M. are discussed image processing using Gabor filters with different frequencies for extract the features of the images , they are used watershed segmentation to separate the touching object in the image of the lung ,it has no smoothing /generalizing properties this method can segment the unique bounders from an image .According to their experimental subjective assessment in the segmentation stage ,the watershed method has more accuracy and quality than thresholding method.[5] In 2015, Eman Magdy, Nourhan Zayed, and Mahmoud Fakhr proposed CAD system to analyze and automatically segment the lungs and classify each lung into normal or cancer. They are used Wiener filtering based on estimating the local mean and variance from a local neighborhood of each pixel then they are combine histogram analysis with morphological operations to segment the lung regions and extract each lung separately. Amplitude and Frequency-Modulation (AM-FM) method was used to extract features for ROIs. Then, the significant AM-FM features have been selected using Partial Least Squares Regression (PLSR) for classification step. Finally, they are used nearest neighbour (NN), support vector machine (SVM), and linear classifiers with the selected AM-FM features [6]. 3Proposed Methodology In this paper, we proposed a system to diagnosis lung cancer disease based on fuzzy logic system , we have used different methods to processing the input image by enhancement the image and separate the different properties of the image , then extract the features of the image by using different approaches , this features will be used as input to neural network that will be used as classifier tool to detect the normal and abnormal image that may contain lung nodule which is small growths in the lung, then we used other lung cancer symptoms such as coughing, blood in sputum, shortness of breath, pain in chest e.t.c as input to expert system to determine the condition of the patient. Figure(1) show the flowchart diagram for the proposed system. Aqeel Mohsin Hamad, International Journal of Computer Science and Mobile Computing, Vol.5 Issue.3, March2016, pg. 32-41 © 2016, IJCSMC All Rights Reserved 34 Figure(1) flowchart diagram for the proposed system 3-1 pre-processing In the image pre-processing stage, we start with rearrange the computed tomography (CT) scan image, CT scan is more likely to show lung tumors than routine chest x-ray image ,its provide precise information about size, shape and position, we rearranged the CT image by extract the important section of the image and resize the image and convert it to gray scale 8-bit image to perform the processing. 3-2 Enhancement We used fuzzy logic system to enhance the image of the lung in order to separate the properties of the image, by using membership function to increase the brightness and darkness of the image, this is achieved by making dark pixel more darker and bright pixel brighter, the pixel having middle intensity value is not changed much. At first we transform image into fuzzy function, modify the member ship function then defuzzification which is the inverse of fuzzification process, figure(2) show the structure of the enhancement system.[7] CT image