Browsing by Author "Rafi, Salwa"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Academics and practitioners exchange views about preparations for 4IR
    (The Financial Express, 2019-05-09) Rafi, Salwa
  • Thumbnail Image
    Item
    Deep convolutional GAN-based data augmentation for medical image classification
    (BRAC University, 2022-01) Datta, Joy; Durdana, Bedria; Rafi, Salwa; Mostakim, Moin
    The field of medical imaging is rapidly growing with the help of machine learning, yet the problem of scarcity in labeled medical imaging still remains. Therefore training a machine learning model for medical image processing is always a difficult task. Data scarcity can be solved by using data augmentation techniques which produce and add additional data to the existing dataset. Importance of an augmented dataset also includes increasing model prediction accuracy, adding more training data to models, reducing data overfitting and creating variability in data, increasing generalization ability of models, resolving class imbalance issues in classification, and lowering data collection and labeling costs. It also helps train convolutional neural networks for increased average accuracy. This paper focuses on solving data deficiency in medical imaging through the use of an MRI dataset based on Alzheimer’s affected patients. It accomplishes this by employing deep convolutional generative adversarial networks (DCGAN) for generating realistic samples from the dataset. Other approaches for making convincing new images from labeled original images differ from using a deep convolutional generative adversarial network. DCGAN learns from training samples and can generate realistic imaging data with a similar variations, distinct from the original data. We chose to further Alzheimer’s research because, like most neurodegenerative disorders, the clinical diagnosis of Alzheimer’s dementia had a sensitivity of 71% to 87% and a specificity of 44% to 71%, implying high rates of Alzheimer’s Disease misdiagnosis among patients with cognitive impairment. Considering that alarming rate, early diagnosis of Alzheimer’s disease necessitates the use of effective automated approaches.