Publications by authors named "J Alirezaie"

Convolutional neural networks (CNN) have been used for a wide variety of deep learning applications, especially in computer vision. For medical image processing, researchers have identified certain challenges associated with CNNs. These challenges encompass the generation of less informative features, limitations in capturing both high and low-frequency information within feature maps, and the computational cost incurred when enhancing receptive fields by deepening the network.

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Article Synopsis
  • The segmentation of the left ventricle (LV) in echocardiographic images is crucial for accurately diagnosing and treating cardiovascular diseases, as it helps assess important cardiac metrics like volume and ejection fraction.
  • While traditional manual methods of LV segmentation can be tedious and error-prone, deep learning techniques like convolutional neural networks (CNNs) have been popular; however, they have limitations such as loss of spatial information and a need for large datasets.
  • This study introduces SegCaps, a new optimized capsule-based network for LV segmentation, which outperformed the standard 2D-UNet by achieving a higher accuracy with significantly fewer parameters, facilitating more precise cardiac evaluations in clinical settings.
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With the increasing concern regarding the radiation exposure of patients undergoing computed tomography (CT) scans, researchers have been using deep learning techniques to improve the quality of denoised low-dose CT (LDCT) images. In this paper, a cascaded dilated residual network (ResNet) with integrated attention modules, specifically spatial- and channel- attention modules, is proposed. This experiment demonstrated how these attention modules improved the denoised CT image by testing a simple ResNet with and without the modules.

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Automatic mandible segmentation of CT images is an essential step to achieve an accurate preoperative prediction of an intended target in three-dimensional (3D) virtual surgical planning. Segmentation of the mandible is a challenging task due to the complexity of the mandible structure, imaging artifacts, and metal implants or dental filling materials. In recent years, utilizing convolutional neural networks (CNNs) have made significant improvements in mandible segmentation.

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Deep learning techniques have emerged in de-noising low-dose computed tomography (CT) images to avoid the potential health risks of high ionizing radiation dose on patients. Although these post-processing methods display high quality denoised images, the denoising performance still has the potential to improve. The primary purpose of this work was to determine and analyze the most effective and efficient hybrid loss function in deep learning (DL)-based denoising network.

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