Results 141 to 150 of about 1,899 (244)

Modeling the Intermediate Flow Regime in Flow‐Compensated Intravoxel Incoherent Motion MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The intravoxel incoherent motion (IVIM) model is commonly used to separate the effects of motion related to diffusion and blood microcirculation (perfusion) on the MR signal. Depending on the encoding time (T), it is possible to probe the different temporal regimes of blood motion, which resemble a ballistic flow at short T and a ...
Louise Rosenqvist, Mikael Montelius, Isabella M. Björkman‐Burtscher, Elina Petersson, Maria Ljungberg, Oscar Jalnefjord   +5 more
wiley   +1 more source

MR sequence design to account for nonideal gradient performance. [PDF]

Magn Reson Med
West DJ, Glang F, Endres J, Leitão D, Zaiss M, Hajnal JV, Malik SJ.   +6 more
europepmc   +1 more source

Timing Is Everything: How Subtle Timing Changes in MRI Echo Planar Imaging Can Significantly Alter Mechanical Vibrations and Sound Level

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Echo‐Planar Imaging (EPI) is central to fMRI, diffusion MRI, and many dynamic clinical applications, yet rapid gradient switching induces strong mechanical vibrations, generates acoustic noise, and contributes to ghosting artifacts—effects that intensify at ultra‐high fields.
Amir Seginer, Alexander Bratch, Shahar Goren, Edna Furman‐Haran, Noam Harel, Essa Yacoub, Rita Schmidt   +6 more
wiley   +1 more source

Musculoskeletal Infection Reporting and Data System (MSKI-RADS): reviewed and explained. [PDF]

Insights Imaging
He A, Duarte Silva F, Guirguis M, Alaia EF, Morrison WB, Chhabra A.   +5 more
europepmc   +1 more source

Spatiotemporal Encoding With Nonlinear Gradient Hardware Using Pulseq: From Principles to Practical Demonstration

Magnetic Resonance in Medicine, EarlyView.
Purpose Provide the theoretical foundation and the first practical demonstration of spatiotemporal encoding (SPEN) using additional nonlinear gradient hardware. Methods The quadratic phase profile can be generated either by a chirped‐RF pulse combined with a constant gradient or, directly, by a quadratic gradient pulse.
Andreas Holl, Frank Zijlstra, Maxim Zaitsev, Jakob Hufschmidt, Shadi Tashakori, Nils Schallner, Thomas Stieglitz, Jens Gröbner, Sebastian Littin   +8 more
wiley   +1 more source

Automated, open-source, vendor-independent quality assurance protocol based on the Pulseq framework. [PDF]

MAGMA
Chen Q, Wehkamp N, Wan C, Hucker P, Büchert M, Littin S, Nielsen JF, Zaitsev M.   +7 more
europepmc   +1 more source

Toward Super‐Resolution Reconstruction of Diffusion–Relaxation MRI Using Slice Excitation With Random Overlap (SERO)

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Diffusion MRI probes tissue microstructure, but low SNR and limited resolution hinder detection of features and parameter estimates. We introduce slice excitation with random overlap (SERO), which enables variable repetition times (TRs) and diffusion weighting within a single shot.
Felix Mortensen, Jakub Jurek, Jens Sjölund, Geraline Vis, Ronnie Wirestam, Malwina Molendowska, Andrzej Materka, Filip Szczepankiewicz   +7 more
wiley   +1 more source

Motion- and Field-Robust Mesoscopic Whole-Brain $$ {T}_2^{\ast } $$ -Weighted Imaging at 7 and 11.7 T Using Servo Navigation. [PDF]

Magn Reson Med
Serger M, Stirnberg R, Ehses P, Riedel M, Ulrich T, Le Ster C, Mauconduit F, Gras V, Amadon A, Vignaud A, Chu S, Gunamony S, Zaitsev M, Boulant N, Pruessmann KP, Stoecker T.   +15 more
europepmc   +1 more source

Optimizing Selective RF Pulses for Enhanced Signal Stability in Turbo Spin Echo Using a Differentiable Extended Phase Graph Model

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To improve slice profile consistency across echo trains in turbo spin echo (TSE) imaging, thereby reducing image blurring and increasing the accuracy of multi echo spin echo T2$$ {T}_2 $$ mapping. Methods Excitation and refocusing RF pulses were optimized for TSE using a differentiable extended phase graph model that incorporates the ...
Madison M. Augelli, Anuj Sharma, Mark A. Griswold, William A. Grissom   +3 more
wiley   +1 more source

Clinical Features, Diagnostic Challenges, and Therapeutic Outcomes of 105 Pilomatricoma Cases. [PDF]

Clin Cosmet Investig Dermatol
Lu C, Zhang R, Bi L, Luo T, Lai W, Fan W, Jing H.   +6 more
europepmc   +1 more source