Results 61 to 70 of about 2,875,040 (196)

Optimizing IMPULSED Acquisition Protocols for Clinical 3T Scanners Through Bayesian Experimental Design

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To optimize diffusion MRI acquisition protocols for Imaging Microstructural Parameters Using Limited Spectrally Edited Diffusion (IMPULSED) model at clinical 3T scanner using Bayesian experimental design, enabling accurate cellular‐scale parameter estimation under realistic scan time and scanner hardware constraints.
Yan Dai, Xun Jia, Todd Aguilera, Kai Jiang, Arely Perez Rodriguez, Isabelle Vanhaezebrouck, Jie Deng   +6 more
wiley   +1 more source

Intravoxel incoherent motion modeling - Optimization of acquisition, analysis and tumor tissue characterization [PDF]

, 2018
Intravoxel incoherent motion (IVIM) analysis provides a means to obtain information on diffusion and perfusion from a single MRI sequence. The measurements are completely noninvasive and the results have been shown to be of interest, for example, in ...
Jalnefjord, Oscar
core   +1 more source

Intravoxel incoherent motion (IVIM) histogram biomarkers for prediction of neoadjuvant treatment response in breast cancer patients

European Journal of Radiology Open, 2017
Objective: To examine the prognostic capabilities of intravoxel incoherent motion (IVIM) metrics and their ability to predict response to neoadjuvant treatment (NAT).
Gene Y. Cho, Lucas Gennaro, Elizabeth J. Sutton, Emily C. Zabor, Zhigang Zhang, Dilip Giri, Linda Moy, Daniel K. Sodickson, Elizabeth A. Morris, Eric E. Sigmund, Sunitha B. Thakur   +10 more
doaj   +1 more source

Simplified Anisotropic IVIM Using Spherical Means and an Application in the Placenta

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To reduce the complexity associated with anisotropic IVIM modeling, we derived two simplified diffusion MRI models that map the apparent diffusivity, relative proportions, and anisotropy of perfusion‐ and diffusion‐related signal components and demonstrated them in placenta scans.
Paddy J. Slator, Luke Pleva, Alexandra Crawford, Lucy Higgins, Edward Johnstone, Alexander E. P. Heazell, Daniel C. Alexander, Josephine H. Naish, Kate Duhig   +8 more
wiley   +1 more source

Perfusion measurement in brain gliomas with intravoxel incoherent motion MRI

, 2014
BACKGROUND AND PURPOSE: Intravoxel incoherent motion MRI has been proposed as an alternative method to measure brain perfusion. Our aim was to evaluate the utility of intravoxel incoherent motion perfusion parameters (the perfusion fraction, the ...
Federau, C., Meuli, R., Hagmann, P., O'Brien, K., Maeder, P.   +4 more
core   +1 more source

A method for improving the performance of gradient systems for diffusion-weighted MRI [PDF]

, 2007
The MR signal is sensitive to diffusion. This effect can be increased by the use of large, balanced bipolar gradients. The gradient systems of MR scanners are calibrated at installation and during regular servicing visits.
Daniel C. Alex, Zoltan Nagy, Ralf Deichmann, Weiskopf, N. ; https://orcid.org/, Alexander, D., Nagy, Z., Nagy, Zoltan, Deichmann, R., Alexander, Daniel C., Weiskopf, Nikolaus, Deichmann, Ralf, Nikolaus Weiskopf   +11 more
core   +1 more source

Prediction of hepatocellular carcinoma response to transarterial chemoembolization with intravoxel incoherent motion diffusion-weighted imaging

The Egyptian Journal of Radiology and Nuclear Medicine, 2022
Background There are several therapeutic options for hepatocellular carcinoma (HCC). As predicting the treatment response is critical in clinical decision making, we aimed to evaluate the quantitative intravoxel incoherent motion (IVIM) diffusion ...
Abdolkarim Haji Ghadery, Niloofar Ayoobi Yazdi, Hamed Bagheri, Anahita Fathi Kazerooni, Faeze Salahshour, Sam Sharifzadeh Javidi, Sandra Saeedi, Hamidreza Saligheh Rad, Babak Shekarchi   +8 more
doaj   +1 more source

Prandial Effects on Intravoxel Incoherent Motion Quantification in the Liver

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate the feasibility of detecting prandial (i.e., meal) induced changes in microvascular flow in the liver, including changes in the spatial distribution of flow velocities, using intravoxel incoherent motion (IVIM) MRI. Methods Thirteen (n = 13) healthy volunteers underwent two liver MR exams: one preprandial after fasting and ...
Gregory Simchick, A. M. K. Muntasir Shamim, Alexandra Anagnostopoulos, Kevin M. Johnson, Diego Hernando   +4 more
wiley   +1 more source

Parameter Estimation of Intravoxel Incoherent Motion Based on Prior-driven [PDF]

Jisuanji kexue
Intravoxel incoherent motion(IVIM) model leverages diffusion-weighted magnetic resonance imaging(DWI) to non-invasively ascertain the diffusion coefficient of water molecules in living tissue(D) and to gather blood perfusion data(F,D*).However ...
HU Guodong, YE Chen
doaj   +1 more source

Study of Diffusion Weighted Imaging Derived Diffusion Parameters as Biomarkers for the Microenvironment in Gliomas

Frontiers in Oncology, 2021
ObjectivesTo explore the efficacy of diffusion weighted imaging (DWI)-derived metrics under different models as surrogate indicators for molecular biomarkers and tumor microenvironment in gliomas.MethodsA retrospective study was performed for 41 patients
Yan Bai, Taiyuan Liu, Lijuan Chen, Haiyan Gao, Wei Wei, Ge Zhang, Lifu Wang, Lingfei Kong, Siyun Liu, Huan Liu, Neil Roberts, Meiyun Wang   +11 more
doaj   +1 more source