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Quantitative susceptibility mapping (QSM) utilizes MRI signal phase to estimate local tissue susceptibility, which has been shown useful to provide novel image contrast and as biomarkers of abnormal tissue. QSM requires addressing a…

医学物理 · 物理学 2019-06-03 Juan Liu , Kevin M. Koch

The convolutional neural network (CNN) learns the same object in different positions in images, which can improve the recognition accuracy of the model. An implication of this is that CNN may know where the object is. The usefulness of the…

计算机视觉与模式识别 · 计算机科学 2023-02-20 Nan Yang , Laicheng Zhong , Fan Huang , Dong Yuan , Wei Bao

Quantitative Susceptibility Mapping (QSM) estimates tissue magnetic susceptibility distributions from Magnetic Resonance (MR) phase measurements by solving an ill-posed dipole inversion problem. Conventional single orientation QSM methods…

图像与视频处理 · 电气工程与系统科学 2020-08-13 Kuo-Wei Lai , Manisha Aggarwal , Peter van Zijl , Xu Li , Jeremias Sulam

In convolutional neural networks (CNNs), padding plays a pivotal role in preserving spatial dimensions throughout the layers. Traditional padding techniques do not explicitly distinguish between the actual image content and the padded…

计算机视觉与模式识别 · 计算机科学 2023-11-20 Juho Kim

Purpose: Quantitative Susceptibility Mapping (QSM) reconstruction is a challenging inverse problem driven by poor conditioning of the field to susceptibility transformation. State-of-art QSM reconstruction methods either suffer from image…

医学物理 · 物理学 2019-03-14 Juan Liu , Andrew S. Nencka , L. Tugan Muftuler , Brad Swearingen , Robin Karr , Kevin M. Koch

Quantitative susceptibility mapping (QSM) is a powerful MRI technique that has shown great potential in quantifying tissue susceptibility in numerous neurological disorders. However, the intrinsic ill-posed dipole inversion problem greatly…

图像与视频处理 · 电气工程与系统科学 2019-10-31 Yicheng Chen , Angela Jakary , Sivakami Avadiappan , Christopher P. Hess , Janine M. Lupo

Quantitative susceptibility mapping (QSM) is a useful magnetic resonance imaging (MRI) technique which provides spatial distribution of magnetic susceptibility values of tissues. QSMs can be obtained by deconvolving the dipole kernel from…

计算机视觉与模式识别 · 计算机科学 2020-12-08 Gyutaek Oh , Hyokyoung Bae , Hyun-Seo Ahn , Sung-Hong Park , Jong Chul Ye

Quantitative susceptibility mapping (QSM) has gained broad interests in the field by extracting biological tissue properties, predominantly myelin, iron and calcium from magnetic resonance imaging (MRI) phase measurements in vivo. Thereby,…

图像与视频处理 · 电气工程与系统科学 2019-12-12 Woojin Jung , Steffen Bollmann , Jongho Lee

Deep neural networks have demonstrated promising potential for the field of medical image reconstruction. In this work, an MRI reconstruction algorithm, which is referred to as quantitative susceptibility mapping (QSM), has been developed…

When applying a convolutional kernel to an image, if the output is to remain the same size as the input then some form of padding is required around the image boundary, meaning that for each layer of convolution in a convolutional neural…

计算机视觉与模式识别 · 计算机科学 2020-12-07 Calden Wloka , John K. Tsotsos

Quantitative susceptibility mapping (QSM) is an MRI phase-based post-processing method that quantifies tissue magnetic susceptibility distributions. However, QSM acquisitions are relatively slow, even with parallel imaging. Incoherent…

图像与视频处理 · 电气工程与系统科学 2021-07-20 Yang Gao , Martijn Cloos , Feng Liu , Stuart Crozier , G. Bruce Pike , Hongfu Sun

Quantitative Susceptibility Mapping is a parametric imaging technique to estimate the magnetic susceptibilities of biological tissues from MRI phase measurements. This problem of estimating the susceptibility map is ill posed. Regularized…

图像与视频处理 · 电气工程与系统科学 2022-10-14 Arvind Balachandrasekaran , Davood Karimi , Camilo Jaimes , Ali Gholipour

Quantitative Susceptibility Mapping (QSM) can estimate the underlying tissue magnetic susceptibility and reveal pathology. Current deep-learning-based approaches to solve the QSM inverse problem are restricted on fixed image resolution.…

医学物理 · 物理学 2019-08-02 Juan Liu , Kevin M. Koch

Long Short-Term Memory (LSTM) Networks and Convolutional Neural Networks (CNN) have become very common and are used in many fields as they were effective in solving many problems where the general neural networks were inefficient. They were…

机器学习 · 计算机科学 2019-03-19 Mahidhar Dwarampudi , N V Subba Reddy

Quantitative Susceptibility Mapping (QSM) reconstruction is a challenging inverse problem driven by ill conditioning of its field-to -susceptibility transformation. State-of-art QSM reconstruction methods either suffer from image artifacts…

人工智能 · 计算机科学 2019-04-12 Juan Liu , Kevin M. Koch

Quantitative susceptibility mapping (QSM) is a valuable magnetic resonance imaging (MRI) contrast mechanism that has demonstrated broad clinical applications. However, the image reconstruction of QSM is challenging due to its ill-posed…

图像与视频处理 · 电气工程与系统科学 2021-01-29 Yang Gao , Xuanyu Zhu , Bradford A. Moffat , Rebecca Glarin , Alan H. Wilman , G. Bruce Pike , Stuart Crozier , Feng Liu , Hongfu Sun

Quantitative susceptibility mapping (QSM) estimates the underlying tissue magnetic susceptibility from MRI gradient-echo phase signal and typically requires several processing steps. These steps involve phase unwrapping, brain volume…

图像与视频处理 · 电气工程与系统科学 2019-05-16 Hongjiang Wei , Steven Cao , Yuyao Zhang , Xiaojun Guan , Fuhua Yan , Kristen W. Yeom , Chunlei Liu

Introduction: Quantitative Susceptibility Mapping (QSM) is generally acquired with full brain coverage, even though many QSM brain-iron studies focus on the deep grey matter (DGM) region only. Reducing the spatial coverage to the DGM…

定量方法 · 定量生物学 2021-06-02 Xuanyu Zhu , Yang Gao , Feng Liu , Stuart Crozier , Hongfu Sun

Convolutional Neural Networks (CNNs) have become the state-of-the-art method to learn from image data. However, recent research shows that they may include a texture and colour bias in their representation, contrary to the intuition that…

计算机视觉与模式识别 · 计算机科学 2019-07-31 Francis Brochu

Over the last decade, Convolutional Neural Network (CNN) models have been highly successful in solving complex vision problems. However, these deep models are perceived as "black box" methods considering the lack of understanding of their…

计算机视觉与模式识别 · 计算机科学 2018-11-13 Aditya Chattopadhyay , Anirban Sarkar , Prantik Howlader , Vineeth N Balasubramanian
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