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We introduce a continuous global optimization method to the field of surface reconstruction from discrete noisy cloud of points with weak information on orientation. The proposed method uses an energy functional combining flux-based…

Graphics · Computer Science 2017-08-01 Rongjiang Pan , Vaclav Skala

Dose reduction in computed tomography (CT) is essential for decreasing radiation risk in clinical applications. Iterative reconstruction is one of the most promising ways to compensate for the increased noise due to reduction of photon…

Image and Video Processing · Electrical Eng. & Systems 2021-03-24 Zhuonan He , Yikun Zhang , Yu Guan , Shanzhou Niu , Yi Zhang , Yang Chen , Qiegen Liu

Utilizing a low-dose CT approach significantly reduces the radiation exposure for patients, yet it introduces challenges, such as increased noise and artifacts in the resultant images, which can hinder accurate medical diagnostics.…

Image and Video Processing · Electrical Eng. & Systems 2024-04-03 Helena Shawn , Thompson Chyrikov , Jacob Lanet , Lam-chi Chen , Jim Zhao , Christina Chajo

Computed tomography (CT) generates a stack of cross-sectional images covering a region of the body. The visual assessment of these images for the identification of potential abnormalities is a challenging and time consuming task due to the…

Machine Learning · Statistics 2016-10-03 Petros-Pavlos Ypsilantis , Giovanni Montana

Cone beam computed tomography (CBCT) images can be used for dose calculation in adaptive radiation therapy (ART). The main challenges are the large artefacts and inaccurate Hounsfield unit (HU) values. Currently, deformed planning CT images…

Medical Physics · Physics 2019-09-04 Xiao Liang , Liyuan Chen , Dan Nguyen , Zhiguo Zhou , Xuejun Gu , Ming Yang , Jing Wang , Steve Jiang

Currently, MRI-only radiotherapy (RT) eliminates some of the concerns about using CT images in RT chains such as the registration of MR images to a separate CT, extra dose delivery, and the additional cost of repeated imaging. However, one…

Medical Physics · Physics 2021-03-03 Faeze Gholamiankhah , Samaneh Mostafapour , Hossein Arabi

This study delves into the effectiveness of various learning methods in improving Transformer models, focusing particularly on the Gated Residual Network Transformer (GRN-Transformer) in the context of pediatric intensive care units (PICU)…

Signal Processing · Electrical Eng. & Systems 2025-05-27 Thanh-Dung Le , Clara Macabiau , Kévin Albert , Symeon Chatzinotas , Philippe Jouvet , Rita Noumeir

Parallelizing Gated Recurrent Unit (GRU) networks is a challenging task, as the training procedure of GRU is inherently sequential. Prior efforts to parallelize GRU have largely focused on conventional parallelization strategies such as…

Computer Vision and Pattern Recognition · Computer Science 2022-03-10 Gordon Euhyun Moon , Eric C. Cyr

Limited angle CT reconstruction is an under-determined linear inverse problem that requires appropriate regularization techniques to be solved. In this work we study how pre-trained generative adversarial networks (GANs) can be used to…

Image and Video Processing · Electrical Eng. & Systems 2020-01-30 Rushil Anirudh , Hyojin Kim , Jayaraman J. Thiagarajan , K. Aditya Mohan , Kyle M. Champley

Gated Linear Units (GLU) have shown great potential in enhancing neural network performance. In this paper, I introduce a novel attention mechanism called GLU Attention, which introduces nonlinearity into the values of Attention. My…

Machine Learning · Computer Science 2025-07-08 Zehao Wang

The use of future contextual information is typically shown to be helpful for acoustic modeling. Recently, we proposed a RNN model called minimal gated recurrent unit with input projection (mGRUIP), in which a context module namely temporal…

Computation and Language · Computer Science 2018-11-27 Jie Li , Yahui Shan , Xiaorui Wang , Yan Li

Magnetic Resonance Imaging (MRI) has long been considered to be among "the gold standards" of diagnostic medical imaging. The long acquisition times, however, render MRI prone to motion artifacts, let alone their adverse contribution to the…

Image and Video Processing · Electrical Eng. & Systems 2021-04-14 Tomer Weiss , Ortal Senouf , Sanketh Vedula , Oleg Michailovich , Michael Zibulevsky , Alex Bronstein

With the emergence of CNT (Carbon nanotube), static and instant CT scanning becomes possible. By transforming the traditionally rotated thermal source into a static ring array source composed of multiple CNTs, the imaging system can achieve…

Medical Physics · Physics 2025-02-11 Jiayu Duan , Yang Li , Jianmei Cai , Xuanqin Mou

We study the classification of animal behavior using accelerometry data through various recurrent neural network (RNN) models. We evaluate the classification performance and complexity of the considered models, which feature long short-time…

Machine Learning · Computer Science 2021-11-29 Liang Wang , Reza Arablouei , Flavio A. P. Alvarenga , Greg J. Bishop-Hurley

We explore the architecture of recurrent neural networks (RNNs) by studying the complexity of string sequences it is able to memorize. Symbolic sequences of different complexity are generated to simulate RNN training and study parameter…

Machine Learning · Computer Science 2023-11-17 Roberto Cahuantzi , Xinye Chen , Stefan Güttel

In image-guided radiotherapy (IGRT), four-dimensional cone-beam computed tomography (4D-CBCT) is critical for assessing tumor motion during a patients breathing cycle prior to beam delivery. However, generating 4D-CBCT images with…

Medical Physics · Physics 2025-01-09 Yabo Fu , Hao Zhang , Weixing Cai , Huiqiao Xie , Licheng Kuo , Laura Cervino , Jean Moran , Xiang Li , Tianfang Li

In recent years, gas recognition technology has received considerable attention. Nevertheless, the gas recognition area has faced obstacles in implementing deep learning-based recognition solutions due to the absence of standardized…

Machine Learning · Computer Science 2024-10-16 Ding Wang

As the medical usage of computed tomography (CT) continues to grow, the radiation dose should remain at a low level to reduce the health risks. Therefore, there is an increasing need for algorithms that can reconstruct high-quality images…

Image and Video Processing · Electrical Eng. & Systems 2021-03-10 Davood Karimi , Rabab K. Ward

Graph Convolutional Networks (GCNs) have proven to be highly effective for skeleton-based action recognition, primarily due to their ability to leverage graph topology for feature aggregation, a key factor in extracting meaningful…

Computer Vision and Pattern Recognition · Computer Science 2025-09-10 Haiqing Ren , Zhongkai Luo , Heng Fan , Xiaohui Yuan , Guanchen Wang , Libo Zhang

Multiple Object Tracking (MOT) has been a useful yet challenging task in many real-world applications such as video surveillance, intelligent retail, and smart city. The challenge is how to model long-term temporal dependencies in an…

Computer Vision and Pattern Recognition · Computer Science 2020-12-29 Zhen Li , Sunzeng Cai , Xiaoyi Wang , Zhe Liu , Nian Xue