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The recently proposed sparsifying transform models incur low computational cost and have been applied to medical imaging. Meanwhile, deep models with nested network structure reveal great potential for learning features in different layers.…

图像与视频处理 · 电气工程与系统科学 2022-03-23 Xikai Yang , Zhishen Huang , Yong Long , Saiprasad Ravishankar

Signal models based on sparse representations have received considerable attention in recent years. On the other hand, deep models consisting of a cascade of functional layers, commonly known as deep neural networks, have been highly…

图像与视频处理 · 电气工程与系统科学 2022-01-19 Xikai Yang , Yong Long , Saiprasad Ravishankar

Sparse-view computed tomography (CT) is an effective method to reduce the radiation exposure in medical imaging. To reduce the severe streaking artifacts that occur in reconstructed images due to violation of the Nyquist/Shannon sampling…

医学物理 · 物理学 2026-03-17 Huiying Li , Yizhuang Song

Magnetic resonance imaging (MRI) is widely used in clinical practice, but it has been traditionally limited by its slow data acquisition. Recent advances in compressed sensing (CS) techniques for MRI reduce acquisition time while…

图像与视频处理 · 电气工程与系统科学 2019-11-06 Bihan Wen , Saiprasad Ravishankar , Luke Pfister , Yoram Bresler

Most traditional algorithms for compressive sensing image reconstruction suffer from the intensive computation. Recently, deep learning-based reconstruction algorithms have been reported, which dramatically reduce the time complexity than…

计算机视觉与模式识别 · 计算机科学 2019-09-05 Hantao Yao , Feng Dai , Dongming Zhang , Yike Ma , Shiliang Zhang , Yongdong Zhang , Qi Tian

Photon-counting CT (PCCT) offers improved diagnostic performance through better spatial and energy resolution, but developing high-quality image reconstruction methods that can deal with these large datasets is challenging. Model-based…

医学物理 · 物理学 2022-08-09 Alma Eguizabal , Ozan Öktem , Mats U. Persson

Spectral Photon-Counting Computed Tomography (SPCCT) is a promising technology that has shown a number of advantages over conventional X-ray Computed Tomography (CT) in the form of material separation, artefact removal and enhanced image…

图像与视频处理 · 电气工程与系统科学 2020-03-10 Dimitris Kamilis , Mario Blatter , Nick Polydorides

Image segmentation plays a pivotal role in several medical-imaging applications by assisting the segmentation of the regions of interest. Deep learning-based approaches have been widely adopted for semantic segmentation of medical data. In…

图像与视频处理 · 电气工程与系统科学 2021-01-20 Abhishek Shivdeo , Rohit Lokwani , Viraj Kulkarni , Amit Kharat , Aniruddha Pant

Detection of unwanted (`foreign') objects within products is a common procedure in many branches of industry for maintaining production quality. X-ray imaging is a fast, non-invasive and widely applicable method for foreign object…

计算机视觉与模式识别 · 计算机科学 2022-08-19 Mathé T. Zeegers , Tristan van Leeuwen , Daniël M. Pelt , Sophia Bethany Coban , Robert van Liere , Kees Joost Batenburg

Compressed sensing (CS) is an efficient method to reconstruct MR image from small sampled data in $k$-space and accelerate the acquisition of MRI. In this work, we propose a novel deep geometric distillation network which combines the…

图像与视频处理 · 电气工程与系统科学 2021-08-30 Xiaohong Fan , Yin Yang , Jianping Zhang

Limited-view computed tomography (CT) presents significant potential for reducing radiation exposure and expediting the scanning process. While deep learning (DL) methods have exhibited promising results in mitigating streaking artifacts…

医学物理 · 物理学 2025-02-18 Changyu Chen , Li Zhang , Yuxiang Xing , Zhiqiang Chen

In X-ray Computed Tomography (CT), projections from many angles are acquired and used for 3D reconstruction. To make CT suitable for in-line quality control, reducing the number of angles while maintaining reconstruction quality is…

图像与视频处理 · 电气工程与系统科学 2025-06-10 Tianyuan Wang , Felix Lucka , Tristan van Leeuwen

This paper seeks to combine dictionary learning and hierarchical image representation in a principled way. To make dictionary atoms capturing additional information from extended receptive fields and attain improved descriptive capacity, we…

计算机视觉与模式识别 · 计算机科学 2019-11-11 Tong Zhang , Fatih Porikli

Photoacoustic (PA) computed tomography (PACT) shows great potentials in various preclinical and clinical applications. A great number of measurements are the premise that obtains a high-quality image, which implies a low imaging rate or a…

计算机视觉与模式识别 · 计算机科学 2021-06-01 Hengrong Lan , Juze Zhang , Changchun Yang , Fei Gao

Cone beam computed tomography (CBCT)-guided puncture has become an established approach for diagnosing and treating early- to mid-stage thoracic tumours, yet the associated radiation exposure substantially elevates the risk of secondary…

Differential phase-contrast computed tomography (DPC-CT) is a powerful analysis tool for soft-tissue and low-atomic-number samples. Limited by the implementation conditions, DPC-CT with incomplete projections happens quite often.…

医学物理 · 物理学 2020-07-01 Jianbing Dong , Jian Fu , Zhao He

Signal models based on sparsity, low-rank and other properties have been exploited for image reconstruction from limited and corrupted data in medical imaging and other computational imaging applications. In particular, sparsifying…

图像与视频处理 · 电气工程与系统科学 2020-01-08 Xuehang Zheng , Saiprasad Ravishankar , Yong Long , Marc Louis Klasky , Brendt Wohlberg

Histopathology plays a pivotal role in medical diagnostics. In contrast to preparing permanent sections for histopathology, a time-consuming process, preparing frozen sections is significantly faster and can be performed during surgery,…

图像与视频处理 · 电气工程与系统科学 2023-10-18 Elad Yoshai , Gil Goldinger , Miki Haifler , Natan T. Shaked

Learning over sparse, high-dimensional data frequently necessitates the use of specialized methods such as the hashing trick. In this work, we design a highly scalable alternative approach that leverages the low degree of feature…

机器学习 · 统计学 2020-06-09 Vladimir Feinberg , Peter Bailis

Assume you encounter an inverse problem that shall be solved for a large number of data, but no ground-truth data is available. To emulate this encounter, in this study, we assume it is unknown how to solve the imaging problem of Computed…