Abdominal CT Liver Parenchyma Segmentation Based on Particle Swarm Optimization
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Transcript of Abdominal CT Liver Parenchyma Segmentation Based on Particle Swarm Optimization
Abdominal CT Liver Parenchyma Segmentation Based
on Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Gehad Ismail Sayed
http://www.egyptscience.net
Overview
Introduction Problem Definition Motivation
Related Work Proposed Approache Results and Discussion Conclusion and Future Works
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Introduction
Problem Definition Liver cancer is one of the most leading death in the
world. Early detection and accurate staging of liver cancer is
considered and important issue Image segmentation is an important task in the image
processing field. Efficient segmentation of images considered important for further object recognition and classification.
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Introduction
Motivation Liver segmentation is essential step for diagnosis liver
disease Manual segmentation of Computed Tomography (CT)
scans are tedious and prohibitively time consuming Automatic Liver segmentation in CT image is a difficult
task due to:- Low level of contrast and blurry edges which characterize the CT
images Gray levels similarity between neighbor organs like spleen, liver and
stomach Variety of liver shape and size
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Related Work
Several approaches for liver segmentation have been proposed, which can be categorized based on the degree of automation:- Fully automatic
Most of these methods respond identically to different patients. They usually produce over segmentation and also give unsatisfied results
Semi or interactive automatic It requires a limited user intervention to complete the task. i.e. Snake model, Active contour, …
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Proposed Approach
Preprocessing Phase
Image Resizing and Median Filter
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Particle Swarm Optimization
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
15 43 images are middle slice frontal images in JPEG format,
selected from a DICOM from different patients Image dimensions: 630x630 Image resolution: 72 DPI, and bit depth of 24 bits.
Dataset Description
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Dataset Samples
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
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a) Original Image b) Median Filter Results c) Cluster-1 d) Cluster-2 e) Cluster-3
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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a) Binarized Clustered Image b) Open Morphology Results
c) Image After Selecting Largest Region d) Close Morphology Results
e) Image After Filling HolesSRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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a) Gradient Image b) Gradient Image After Normalization
d) Image After Applying Watershed and e) Visualization of Extracted Liver Taking the Largest Region
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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Parameter Value (s)Population Size 150
Number of Iterations 100.60.6255
02-2
w 0.4Number of Levels 3
PSO Parameters Settings
12maxXminXmaxVminV
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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Authors Year AccuracyJeongjin et al. 2007 70%
Ruchaneewan et al. 2007 86%M. Abdallal 2012 84%Z. Abdallal 2012 92%M. Anter 2013 93%N. Aldeek 2014 87%
Proposed Approach 2015 94%
Comparison Between the Proposed Approach and The Previous Approaches
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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Dice (%) Correlation (%) True Positive (%)Using Watershed 91.89 90.62 94.62
Without Using Watershed
89.12 87.94 90.23
Comparison Between Using Watershed in The Proposed Approach and Without Using It
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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Dice (%) Correlation (%) True Positive (%) CPU Process Time in Seconds
2 78.80 76.51 71.71 50.263 91.89 90.62 94.62 56.664 87.98 86.83 93.36 62.395 80.48 80.62 88.44 75.69
Comparison Between The Results Obtained From Different Levels
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
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Dice (%) Correlation (%) True Positive (%)Active Contour 71.87 69.22 72.43
Global Threshold 81.34 79.41 81.19Proposed Approach 91.89 90.62 94.62
Comparison Between The Proposed Approach and The Other Approaches
SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Results and Discussion
Conclusion and Future Works
Conclusion The experimental results show that the proposed approach
gives better result compared with other approaches and obtained over all accuracy about 94% of good liver extraction.
These results from proposed approach can help for further diagnosis and treatment planning
Future Works Increase the number of CT images dataset to evaluate the
performance of the proposed approach Test new versions of PSO
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SRGE Workshop, Cairo University Conference Hall (28-November-2015)
Thanks and Acknowledgement26
SRGE Workshop, Cairo University Conference Hall (28-November-2015)