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Contrastive learning methods in self-supervised settings have primarily focused on pre-training encoders, while decoders are typically introduced and trained separately for downstream dense prediction tasks. However, this conventional…

计算机视觉与模式识别 · 计算机科学 2026-03-05 Sébastien Quetin , Tapotosh Ghosh , Farhad Maleki

We have recently developed a phantom that simulates acute ischemic stroke. We attempted to visualize acute-stage cerebral infarction by applying virtual monochromatic images to this phantom using dual-energy CT (DECT). Virtual monochromatic…

Detector-based spectral computed tomography is a recent dual-energy CT (DECT) technology that offers the possibility of obtaining spectral information. From this spectral data, different types of images can be derived, amongst others…

图像与视频处理 · 电气工程与系统科学 2022-10-10 Constantin Seibold , Matthias A. Fink , Charlotte Goos , Hans-Ulrich Kauczor , Heinz-Peter Schlemmer , Rainer Stiefelhagen , Jens Kleesiek

In clinical CT, the x-ray source emits polychromatic x-rays, which are detected in the current-integrating mode. This physical process is accurately described by an energy-dependent non-linear integral model on the basis of the Beer-Lambert…

医学物理 · 物理学 2018-01-11 Wenxiang Cong , Ge Wang

Iodinated contrast media is essential for dual-energy computed tomography (DECT) angiography. Previous studies show that iodinated contrast media may cause side effects, and the interruption of the supply chain in 2022 led to a severe…

图像与视频处理 · 电气工程与系统科学 2023-08-28 Qing Lyu , Josh Tan , Megan E. Lipford , Chuang Niu , Micheal E. Zapadka , Christopher M. Lack , Jonathan D. Clemente , Christopher T. Whitlow , Ge Wang

Dual-energy computed tomography (DECT) has been widely used to obtain quantitative elemental composition of imaged subjects for personalized and precise medical diagnosis. Compared with DECT leveraging advanced X-ray source and/or detector…

医学物理 · 物理学 2024-08-28 Qiaoxin Li , Ruifeng Chen , Peng Wang , Guotao Quan , Yanfeng Du , Dong Liang , Yinsheng Li

Contrast Enhanced Spectral Mammography (CESM) is a dual-energy mammographic imaging technique that first needs intravenously administration of an iodinated contrast medium; then, it collects both a low-energy image, comparable to standard…

图像与视频处理 · 电气工程与系统科学 2026-03-13 Aurora Rofena , Valerio Guarrasi , Marina Sarli , Claudia Lucia Piccolo , Matteo Sammarra , Bruno Beomonte Zobel , Paolo Soda

Convolutional neural networks (CNN) have shown state-of-the-art results for low-level computer vision problems such as stereo and monocular disparity estimations, but still, have much room to further improve their performance in terms of…

图像与视频处理 · 电气工程与系统科学 2019-03-22 Juan Luis Gonzalez Bello , Munchurl Kim

Single-Photon Emission Computed Tomography (SPECT) is widely applied for the diagnosis of coronary artery diseases. Low-dose (LD) SPECT aims to minimize radiation exposure but leads to increased image noise. Limited-view (LV) SPECT, such as…

图像与视频处理 · 电气工程与系统科学 2024-01-25 Xiongchao Chen , Bo Zhou , Xueqi Guo , Huidong Xie , Qiong Liu , James S. Duncan , Albert J. Sinusas , Chi Liu

Dual energy computed tomography (DECT) imaging plays an important role in advanced imaging applications due to its material decomposition capability. Image-domain decomposition operates directly on CT images using linear matrix inversion,…

图像与视频处理 · 电气工程与系统科学 2019-08-20 Zhipeng Li , Saiprasad Ravishankar , Yong Long , Jeffrey A. Fessler

Medical image segmentation, or computing voxelwise semantic masks, is a fundamental yet challenging task to compute a voxel-level semantic mask. To increase the ability of encoder-decoder neural networks to perform this task across large…

计算机视觉与模式识别 · 计算机科学 2021-11-10 Ho Hin Lee , Yucheng Tang , Qi Yang , Xin Yu , Shunxing Bao , Leon Y. Cai , Lucas W. Remedios , Bennett A. Landman , Yuankai Huo

Purpose: Dual-energy CT (DECT) has been shown to derive stopping power ratio (SPR) map with higher accuracy than conventional single energy CT (SECT) by obtaining the energy dependence of photon interactions. However, DECT is not as widely…

Cone-beam CT (CBCT) is installed in the treatment room to facilitate online clinical applications, including image guidance in radiation and surgery. Half-fan and short-can are the commonly used modes in clinical applications to expand the…

医学物理 · 物理学 2022-05-24 Junbo Peng

Recent advances in end-to-end unsupervised learning has significantly improved the performance of monocular depth prediction and alleviated the requirement of ground truth depth. Although a plethora of work has been done in enforcing…

计算机视觉与模式识别 · 计算机科学 2020-05-19 Vinay Kaushik , Brejesh Lall

Current unified multimodal models for image generation and editing typically rely on massive parameter scales (e.g., >10B), entailing prohibitive training costs and deployment footprints. In this work, we present DeepGen 1.0, a lightweight…

Self-supervised monocular depth estimation has gathered notable interest since it can liberate training from dependency on depth annotations. In monocular video training case, recent methods only conduct view synthesis between existing…

计算机视觉与模式识别 · 计算机科学 2024-07-22 Jinfeng Liu , Lingtong Kong , Bo Li , Zerong Wang , Hong Gu , Jinwei Chen

Despite that deep learning (DL) methods have presented tremendous potential in many medical image analysis tasks, the practical applications of medical DL models are limited due to the lack of enough data samples with manual annotations. By…

计算机视觉与模式识别 · 计算机科学 2025-03-26 Zhiyang Liu , Dong Yang , Minghao Zhang , Hanyu Sun , Hong Wu , Huiying Wang , Wen Shen , Chao Chai , Shuang Xia

In this paper, we explore the possibility of building a unified foundation model that can be adapted to both vision-only and text-only tasks. Starting from BERT and ViT, we design a unified transformer consisting of modality-specific…

计算机视觉与模式识别 · 计算机科学 2021-12-15 Qing Li , Boqing Gong , Yin Cui , Dan Kondratyuk , Xianzhi Du , Ming-Hsuan Yang , Matthew Brown

Depth estimation provides essential information to perform autonomous driving and driver assistance. Especially, Monocular Depth Estimation is interesting from a practical point of view, since using a single camera is cheaper than many…

计算机视觉与模式识别 · 计算机科学 2018-09-13 Akhil Gurram , Onay Urfalioglu , Ibrahim Halfaoui , Fahd Bouzaraa , Antonio M. Lopez

Image compression is a widely used technique to reduce the spatial redundancy in images. Recently, learning based image compression has achieved significant progress by using the powerful representation ability from neural networks.…

图像与视频处理 · 电气工程与系统科学 2020-05-26 Jiaheng Liu , Guo Lu , Zhihao Hu , Dong Xu