Filters








10,536 Hits in 5.1 sec

Accelerated Computing in Magnetic Resonance Imaging: Real-Time Imaging Using Nonlinear Inverse Reconstruction

Sebastian Schaetz, Dirk Voit, Jens Frahm, Martin Uecker
2017 Computational and Mathematical Methods in Medicine  
To develop generic optimization strategies for image reconstruction using graphical processing units (GPUs) in magnetic resonance imaging (MRI) and to exemplarily report on our experience with a highly  ...  Real-time reconstruction with low latency and frame rates up to 30 frames per second is demonstrated. Conclusion.  ...  Recent advances in magnetic resonance imaging (MRI) pose new challenges to the implementations of associated algorithms in order to keep data acquisition and reconstruction times on par.  ... 
doi:10.1155/2017/3527269 pmid:29463984 pmcid:PMC5804376 fatcat:4cnivjba3zbqphtpxk37njwnhm

Magnetic Resonance Sequences and Rapid Acquisition for MR-Guided Interventions

Adrienne E. Campbell-Washburn, Anthony Z. Faranesh, Robert J. Lederman, Michael S. Hansen
2015 Magnetic Resonance Imaging Clinics of North America  
Dynamic procedural guidance with real-time imaging has pushed the limits of MR technology, demanding rapid acquisition and reconstruction paired with interactive control and device visualization.  ...  This article reviews the technical aspects of real-time MR sequences that enable MR-guided interventions.  ...  Inversion pulses can be inserted into the real-time pulse sequence for infarct imaging 8 .  ... 
doi:10.1016/j.mric.2015.05.006 pmid:26499283 pmcid:PMC4621782 fatcat:jhyfecgj3je37kl22agzvpnjw4

Improved real-time exercise stress cardiac cine imaging using self consistent parallel imaging with temporal sensitivity estimation (TSPIRIT)

Hui Xue, Yu Ding, Ti-Chiun Chang, Christoph Guetter, Subha V Raman, Marie-Pierre Jolly, Orlando P Simonetti
2012 Journal of Cardiovascular Magnetic Resonance  
To improve the image quality and increase the signalnoise-ratio of real-time exercise stress cardiac cine imaging, we extended the recently proposed SPIRIT image reconstruction by incorporating temporal  ...  Example images acquired using acceleration rate 4 and reconstructed using linear TGRAPPA (a,c,e) and non-linear TSPIRIT (b, d,f).  ...  Summary To improve the image quality and increase the signalnoise-ratio of real-time exercise stress cardiac cine imaging, we extended the recently proposed SPIRIT image reconstruction by incorporating  ... 
doi:10.1186/1532-429x-14-s1-p254 pmcid:PMC3311101 fatcat:anakaiutfbc27hpyigx3u7r4dy

Parallel Magnetic Resonance Imaging [article]

Martin Uecker
2015 arXiv   pre-print
The main disadvantage of Magnetic Resonance Imaging (MRI) are its long scan times and, in consequence, its sensitivity to motion.  ...  Because parallel magnetic resonance imaging can be used to accelerate basically any imaging sequence it has many important applications.  ...  Because parallel magnetic resonance imaging can be used to accelerate basically any imaging sequence it has many important applications.  ... 
arXiv:1501.06209v2 fatcat:32f4xy4mc5afdmsh2z2wtkbafu

Fast Real-Time Cardiac MRI: a Review of Current Techniques and Future Directions

Xiaoqing Wang, Martin Uecker, Li Feng
2021 Investigative Magnetic Resonance Imaging  
In addition, we present several research trends in this direction, including deep learning-based image reconstruction and other advanced real-time cardiac MRI strategies that reconstruct images acquired  ...  In particular, we classified existing techniques into two categories based on the use of non-iterative and iterative reconstruction.  ...  INTRODUCTION Cardiac magnetic resonance imaging (MRI) is a valuable and powerful non-invasive imaging modality for evaluating the cardiovascular system.  ... 
doi:10.13104/imri.2021.25.4.252 fatcat:75fc433arjhd5krviykot7qyou

Physics-based Reconstruction Methods for Magnetic Resonance Imaging [article]

Xiaoqing Wang, Zhengguo Tan, Nick Scholand, Volkert Roeloffs, Martin Uecker
2021 arXiv   pre-print
Conventional Magnetic Resonance Imaging (MRI) is hampered by long scan times and only qualitative image contrasts that prohibit a direct comparison between different systems.  ...  image reconstruction -- addressing both shortcomings of conventional MRI at the same time.  ...  Further, synthetic images were computed for all inversion/echo times and the image series was then converted into movies showing the contrast changes in Supplementary Videos 1 and 2.  ... 
arXiv:2010.01403v3 fatcat:dwd2abbjgvhpvh4c63lmmyaouy

Fast reconstruction for multichannel compressed sensing using a hierarchically semiseparable solver

Stephen F. Cauley, Yuanzhe Xi, Berkin Bilgic, Jianlin Xia, Elfar Adalsteinsson, Venkataramanan Balakrishnan, Lawrence L. Wald, Kawin Setsompop
2014 Magnetic Resonance in Medicine  
Conclusion- The proposed HSS-Inverse method is highly efficient and should enable real-time CS reconstruction on standard MRI vendors' computational hardware.  ...  In vivo 3T brain data at multiple image contrasts, resolutions, acceleration factors, and number of receive channels were used for this comparison.  ...  Introduction In clinical applications of structural magnetic resonance imaging (MRI), there exists a multiobjective tradeoff between image quality, imaging time, and reconstruction time.  ... 
doi:10.1002/mrm.25222 pmid:24639238 pmcid:PMC4167172 fatcat:56pv6xio7jcs7hqzf6fie7ukhe

Deep Unrolling for Magnetic Resonance Fingerprinting [article]

Dongdong Chen, Mike E. Davies, Mohammad Golbabaee
2022 arXiv   pre-print
Magnetic Resonance Fingerprinting (MRF) has emerged as a promising quantitative MR imaging approach.  ...  In this paper, as a complementary to [1], we investigate other choices of encoders to build the proximal neural network, and evaluate the deep unrolling algorithm on real accelerated MRF scans with non-Cartesian  ...  This research study was conducted retrospectively using anonymised human subject scans made available by GE Healthcare who obtained informed consent in compliance with the German Act on Medical Devices  ... 
arXiv:2201.09375v2 fatcat:2jpezqxq7zdjzfpibvpeyg4kdm

Physics-Driven Deep Learning for Computational Magnetic Resonance Imaging [article]

Kerstin Hammernik, Thomas Küstner, Burhaneddin Yaman, Zhengnan Huang, Daniel Rueckert, Florian Knoll, Mehmet Akçakaya
2022 arXiv   pre-print
Physics-driven deep learning methods have emerged as a powerful tool for computational magnetic resonance imaging (MRI) problems, pushing reconstruction performance to new limits.  ...  We consider inverse problems with both linear and non-linear forward models for computational MRI, and review the classical approaches for solving these.  ...  Solving the non-linear inverse problem in classical computational MRI A more accurate and complete description of the MR signal model is obtained if other effects like tissue relaxivity, off-resonance,  ... 
arXiv:2203.12215v1 fatcat:6k4camjddveqtlt33m4a7vq4cu

Reconstruction of undersampled radial PatLoc imaging using total generalized variation

Florian Knoll, Gerrit Schultz, Kristian Bredies, Daniel Gallichan, Maxim Zaitsev, Jürgen Hennig, Rudolf Stollberger
2012 Magnetic Resonance in Medicine  
Using this operator, it is also possible to implement an iterative conjugate gradient (CG) SENSE based method for PatLoc reconstruction, which leads to a significant reduction of computation time in comparison  ...  With this operator, it is also possible to implement an adapted iterative SENSE method (18) for PatLoc reconstruction, which leads to a tremendous reduction of computation time in comparison to conventional  ...  Due to the extensive requirements in terms of computation time and memory, the inversion of the encoding matrix was only performed for this experiment.  ... 
doi:10.1002/mrm.24426 pmid:22847824 pmcid:PMC4878715 fatcat:fmtqttlylzejhdg3appdy2w3su

Adaptive Volterra Filter for Parallel MRI Reconstruction

Haifeng Wang, Yihang Zhou, Shi Su, Zhanqi Hu, Jianxiang Liao, Yuchou Chang
2019 EURASIP Journal on Advances in Signal Processing  
Parallel magnetic resonance imaging (MRI) technique is able to accelerate MRI speed for reducing costs and enhancing patient's comfortability.  ...  However, noise cannot be suppressed or removed during the linear reconstruction process and therefore reconstructed image often suffers serious noise, especially when the acceleration factor is high.  ...  . b-g Reconstructed images using AV-GRAPPA with different numbers of the second-order terms.  ... 
doi:10.1186/s13634-019-0633-5 fatcat:anroaya46zhqbfrew2csdyxys4

3Parallel magnetic resonance imaging with adaptive radius ink-space (PARS): Constrained image reconstruction usingk-space locality in radiofrequency coil encoded data

Ernest N. Yeh, Charles A. McKenzie, Michael A. Ohliger, Daniel K. Sodickson
2005 Magnetic Resonance in Medicine  
The proposed method, parallel magnetic resonance imaging with adaptive radius in k-space (PARS), harnesses this physical property of RF coil encoding via a sliding-kernel approach.  ...  PARS reconstructions of undersampled in vivo Cartesian and non-Cartesian data sets are shown and are compared selectively with traditional SENSE reconstructions.  ...  ACKNOWLEDGMENTS The authors thank René Botnar for his generous help and guidance in the acquisition of non-Cartesian data sets used in this work.  ... 
doi:10.1002/mrm.20490 pmid:15906283 fatcat:y4udnykxxrgktmebhf4obpinxy

Accelerating the computation for real-time application of the sinc function using graphics processing units

Sangwoo Kim, Chulhyun Lee
2020 Journal of Analytical Science and Technology  
In magnetic resonance imaging, the fidelity of image reconstruction is an important criterion.  ...  We implemented an accelerated convolution function with the sinc kernel using GPUs computing and evaluated the reconstruction performance.  ...  Availability of data and materials The computational code sets used in this study are available on a reasonable request from the corresponding author.  ... 
doi:10.1186/s40543-020-0205-1 fatcat:ol3ipeaqjng6zotyymfyasbx7a

Accelerated free breathing ECG triggered contrast enhanced pulmonary vein magnetic resonance angiography using compressed sensing

Sébastien Roujol, Murilo Foppa, Tamer A Basha, Mehmet Akçakaya, Kraig V Kissinger, Beth Goddu, Sophie Berg, Reza Nezafat
2014 Journal of Cardiovascular Magnetic Resonance  
To investigate the feasibility of accelerated electrocardiogram (ECG)-triggered contrast enhanced pulmonary vein magnetic resonance angiography (CE-PV MRA) with isotropic spatial resolution using compressed  ...  There were no significant differences in the subjective image quality scores between the techniques (3.32 ± 0.94 vs. 3.53 ± 0.77 using the proposed technique).  ...  Both signal to noise ratio (SNR) and contrast to noise ratio (CNR) were not examined in our study due to non-linear LOST reconstruction.  ... 
doi:10.1186/s12968-014-0091-z pmid:25416082 pmcid:PMC4240816 fatcat:xzo4ilo4kvbt7larkybmsqkxmy

Fast concomitant gradient field and field inhomogeneity correction for spiral cardiac imaging

Joseph Y. Cheng, Juan M. Santos, John M. Pauly
2011 Magnetic Resonance in Medicine  
Non-Cartesian imaging provides many advantages in terms of flexibility, functionality, and speed. However, a major drawback to these imaging methods is off-resonance distortion artifacts.  ...  To take advantage of their speed and accuracy, the algorithms are applied to a real-time cardiac study and a high-resolution cardiac study.  ...  We reduce the computational complexity to correct for both inhomogeneity and concomitant off-resonance effects in real-time.  ... 
doi:10.1002/mrm.22802 pmid:21384423 pmcid:PMC3158031 fatcat:trffwoz3ybh6vbsnbrdyt76nwq
« Previous Showing results 1 — 15 out of 10,536 results