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Tumor cell classification using deep-learning
Majerčík, Jakub ; Kolář, Radim (oponent) ; Vičar, Tomáš (vedoucí práce)
Classification of microscopic cancer cell images finds its use in a wide variety of biological and medical applications. This work aims to classify two lines of aggressive tumor prostate cells with induced zinc resistance using deep learning methods, and provide an interpretation of occurring classification processes. Dataset consists of more than 750 images, whose acquisition was performed using optical diffraction tomography. This microscopy method allowed for non-invasive cell imaging in their native state. This work shows an implementation of a convolutional neural network, along with methods for visualization of classification processes used to generate localization maps (Grad-CAM and an occlusion-based method). The neural network classifies two prostate cell lines used in study with an accuracy of 98,08% and the aggressive zinc-resistance phenotype with an accuracy of 96,08%. Localization maps and manual segmentation masks of cell borders, nuclei and nucleoli allowed for analysis of sub-celullar regions, which indicates that the decisive region for correct classification is the region of cytoplasm. This is most likely the result of variable vesicle count in cytoplasm, their size, as well as the overall cell size and the morfological structure of their cytoplasmic membrane depending on a given phenotype.
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Cell And Sub-Cellular Segmentation In Quantitative Phase Imaging Using U-Net
Majerčík, Jakub ; Špaček, Michal
The ability to automatically segment images, especially microscopy images of cells, opensnew opportunities in cancer research or other practical applications. Recent advancements in deeplearning enabled for effective single-cell segmentation, however, automatic segmentation of subcellularregions is still challenging. This work describes an implementation of a U-net neural networkfor label-free segmentation of sub-cellular regions on images of adherent prostate cancer cells,specifically PC-3 and 22Rv1. Using the best performing approach, out of all that have been tested,we have managed to distinguish between objects and background with average dice coefficients of0.83, 0.78 and 0.63 for whole cells, nuclei and nucleoli respectively
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Prostatic Cells Classification Using Deep Learning
Majerčík, Jakub ; Špaček, Michal
Human prostate cancer PC-3 cell line is widely used in cancer research. Previously, Zinc- Resistant variant was described characteristically by higher dry cellular mass determined by quantitative phase imaging. This work aims to classify these 2 cell types into corresponding categories using machine learning methods. We have achieved 97.5% accuracy with the correct preprocessing using Res-Net network.
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Tumor cell classification using deep-learning
Majerčík, Jakub ; Kolář, Radim (oponent) ; Vičar, Tomáš (vedoucí práce)
Classification of microscopic cancer cell images finds its use in a wide variety of biological and medical applications. This work aims to classify two lines of aggressive tumor prostate cells with induced zinc resistance using deep learning methods, and provide an interpretation of occurring classification processes. Dataset consists of more than 750 images, whose acquisition was performed using optical diffraction tomography. This microscopy method allowed for non-invasive cell imaging in their native state. This work shows an implementation of a convolutional neural network, along with methods for visualization of classification processes used to generate localization maps (Grad-CAM and an occlusion-based method). The neural network classifies two prostate cell lines used in study with an accuracy of 98,08% and the aggressive zinc-resistance phenotype with an accuracy of 96,08%. Localization maps and manual segmentation masks of cell borders, nuclei and nucleoli allowed for analysis of sub-celullar regions, which indicates that the decisive region for correct classification is the region of cytoplasm. This is most likely the result of variable vesicle count in cytoplasm, their size, as well as the overall cell size and the morfological structure of their cytoplasmic membrane depending on a given phenotype.
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