11. 11
腦部核磁共振影像處理目前狀況
結構形態學之方法-based on spatial properties, features
統計方法-based on probability distributions used to model image intensity
光譜方法 -based on spectral information provided by image sequences.
目前用於MRI分析之方法
17. 17
實驗環境與資料
NVIDIA GTX 980 (Maxwell) with 2048 CUDA cores and 7GB GDDR3 RAM
The hosts (CPU) Intel Xeon E3-1231 v3 3.40GHz with 64GB RAM
CUDA version is 6.5
Data Size 1150*1280
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24. 24
傳統的CNN應用於醫學影像處理
1993, CNN被用於辨識肺腫瘤 [1]
1995, CNN被用於檢視乳房鈣化 [2]
1996, CNN被用於從乳房X光影像中取出腫瘤或正常組織 [3]
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[1] S. C. B. Lo, J. S. J. Lin, M. T. Freedman, and S. K. Mun, “Computerassisteddiagnosis of lung nodule detection using artificial convolutionneural-
network,” Proc. SPIE Med. Imag., Image Process., vol. 1898,pp. 859–869, 1993.
[2] H.-P. Chan, S.-C. Lo, B. Sahiner, K. L. Lam, and M. A. Helvie, “Computer-aideddetection of mammographic microcalcifications:
Patternrecognition with an artificial neural network,” Med. Phys., vol. 22, no.10, pp. 1555–67, 1995.
[3] B. Sahiner et al., “Classification of mass and normal breasttissue: A convolutionneural network classifier with spatial domain and texture
images,”IEEE Trans. Med. Imag., vol. 15, no. 5, pp. 598–610, Oct. 1996.
28. 28NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
腦部微出血
腦部微出血(Cerebral microbleeds: CMB)是近年來相當重要的課題
可能影響:
腦部類澱粉血管病變
高血壓血管病變
腦白質病變等
29. 29NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
腦部微出血 MRI
CMB 通常在腦部核磁共振影像中呈
現小於 5mm、均質圓形之低訊號病
灶。
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
30. 30NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
NETWORK FRAMEWORK
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
31. 31NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
3D CNN MODEL
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
32. 32NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
WORKFLOW
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
33. 33NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
實驗結果 (1)
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
34. 34NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
實驗結果 (2)
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
35. 35NVIDIA CONFIDENTIAL. DO NOT DISTRIBUTE.
實驗結果 (3)
Qi Dou, et al., "Automatic Detection of Cerebral Microbleeds From MR Images via 3D Convolutional Neural Networks," IEEE TRANSACTIONS ON MEDICAL IMAGING, 2016
37. 37
DEEP MRI BRAIN EXTRACTION (1)
• Brain extraction from MRI
• Skull stripping
• Removing non-brain tissue
• CNN
• Fully-convolutional
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(http://www.wjgnet.com/1949-8470/full/v6/i11/855.htm)
Deep MRI brain extraction: A 3D convolutional neural network for skull stripping
(Heidelberg University Hospital, Heidelberg, Germany), 2016
38. 38
DEEP MRI BRAIN EXTRACTION (2)
Deep MRI brain extraction: A 3D convolutional neural network for skull stripping
(Heidelberg University Hospital, Heidelberg, Germany)
39. 39
HOUGH-CNN
Deep Learning for Segmentation of Deep Brain Regions in MRI and
Ultrasound, 2016
• Combination of CNN and Voting Strategy
• Caffe framework
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44. 44
FREESURFER
FreeSurfer is a software package for the analysis and visualization of structural and
functional neuroimaging data from cross-sectional or longitudinal studies.
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(http://surfer.nmr.mgh.harvard.edu/)
45. 45
NIFTYREC
• GPU (CUDA) accelerated projection and back-projection for Emission Tomography
• GPU (CUDA) accelerated projection for Transmission Tomography (ray-casting)
• Depth-dependent collimator/detector response (Emission Tomography)
9/26/16https://sourceforge.net/projects/niftyrec/