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SPARSE: Seed Point Auto‐Generation for Random Walks Segmentation Enhancement in medical inhomogeneous targets delineation of morphological MR and CT images
- Source :
- Journal of Applied Clinical Medical Physics
- Publication Year :
- 2015
- Publisher :
- John Wiley and Sons Inc., 2015.
-
Abstract
- In medical image processing, robust segmentation of inhomogeneous targets is a challenging problem. Because of the complexity and diversity in medical images, the commonly used semiautomatic segmentation algorithms usually fail in the segmentation of inhomogeneous objects. In this study, we propose a novel algorithm imbedded with a seed point autogeneration for random walks segmentation enhancement, namely SPARSE, for better segmentation of inhomogeneous objects. With a few user‐labeled points, SPARSE is able to generate extended seed points by estimating the probability of each voxel with respect to the labels. The random walks algorithm is then applied upon the extended seed points to achieve improved segmentation result. SPARSE is implemented under the compute unified device architecture (CUDA) programming environment on graphic processing unit (GPU) hardware platform. Quantitative evaluations are performed using clinical homogeneous and inhomogeneous cases. It is found that the SPARSE can greatly decrease the sensitiveness to initial seed points in terms of location and quantity, as well as the freedom of selecting parameters in edge weighting function. The evaluation results of SPARSE also demonstrate substantial improvements in accuracy and robustness to inhomogeneous target segmentation over the original random walks algorithm. PACS number: 87.57.nm
- Subjects :
- Mathematical optimization
Lung Neoplasms
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Scale-space segmentation
Image processing
autogeneration
Pattern Recognition, Automated
CUDA
Medical Imaging
seed point
Robustness (computer science)
inhomogeneous target
Image Interpretation, Computer-Assisted
Image Processing, Computer-Assisted
Humans
Radiology, Nuclear Medicine and imaging
Segmentation
Instrumentation
Mathematics
Radiation
business.industry
Segmentation-based object categorization
Phantoms, Imaging
segmentation
Pattern recognition
random walks
Image segmentation
Magnetic Resonance Imaging
Radiographic Image Enhancement
Region growing
Data Interpretation, Statistical
Artificial intelligence
business
Tomography, X-Ray Computed
Algorithms
Subjects
Details
- Language :
- English
- ISSN :
- 15269914
- Volume :
- 16
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Clinical Medical Physics
- Accession number :
- edsair.doi.dedup.....a8da937bc4ea39ea19f8ba05cb4e847c