Results 81 to 90 of about 26,868 (222)

A Severity‐Agnostic Atrophy Pattern in Spinocerebellar Ataxia Type 3: Volumetrics from ENIGMA‐Ataxia

Movement Disorders, EarlyView.
Background Spinocerebellar ataxia type 3 (SCA3) is a rare, inherited neurodegenerative disease characterized by progressive loss of motor coordination. Objectives We undertook a multisite magnetic resonance imaging study to profile the spatial spread of atrophy across the brain, determine whether atrophy preferentially maps onto specific functional ...
Jason W. Robertson, Isaac Adanyeguh, David J. Arpin, Tetsuo Ashizawa, Benjamin Bender, Fernando Cendes, Xi Chen, Giulia Coarelli, Léo Coutinho, Andreas Deistung, Imis Dogan, Alexandra Durr, Jennifer Faber, for the ESMI MR Study Group, Juan Fernandez‐Ruiz, Mónica Ferreira, Marcondes C. França, Sophia L. Göricke, Shuo Han, Thomas Klockgether, Chen Liu, Jun Luo, Alberto R.M. Martinez, Sergio E. Ono, Chiadi U. Onyike, Gülin Öz, for the EUROSCA MR Study Group, Henry Paulson, Jerry L. Prince, Kathrin Reetz, Thiago J.R. Rezende, Matthis Synofzik, Hélio A. Ghizoni Teive, Sophia I. Thomopoulos, Paul M. Thompson, Dagmar Timmann, David Vaillancourt, Bart van de Warrenburg, Judith van Gaalen, Xingang Wang, Philipp Wegner, Sarah H. Ying, Ian H. Harding, Carlos R. Hernandez‐Castillo   +43 more
wiley   +1 more source

Usporedba 7T MR i 3T MR u dijagnostici bolesti mozga

, 2023
MRI has greatly improved diagnostic medicine in recent decades. By constantly changing and improving technological aspects, MRI is becoming an increasingly sophisticated and refined method. By constantly tending to increase the used magnetic field, the
Matijaš, Tatjana, Martinović, Jelena
core   +2 more sources

Evaluation of Phantom Doping Materials in Quantitative Susceptibility Mapping

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To measure magnetic susceptibility (χ) with Quantitative Susceptibility Mapping (QSM) and evaluate its repeatability using four phantom doping materials relevant to QSM applications. Methods A cylindrical phantom was constructed containing vials of agarose gel doped with two paramagnetic materials (ferritin, USPIO) and two diamagnetic ...
Padriac Hooper, Jin Jin, Kieran O'Brien, Monique Tourell, Simon Daniel Robinson, Markus Barth   +5 more
wiley   +1 more source

BTS-Net: Barlow twins-based superresolution for 7T human brain MRI

NeuroImage
This study aimed to develop and validate a Barlow Twins-based superresolution diffusion network (BTS-Net) for 7T human brain magnetic resonance imaging (MRI) superresolution (SR).
Youho Myong, Dan Yoon, Young Gyun Kim, Yongsik Sim, Jee-Hyun Cho, Youngkyu Song, Minwoo Cho, Byung-Mo Oh, Sungwan Kim   +8 more
doaj   +1 more source

Characterizing geometrical accuracy in clinically optimised 7T and 3T magnetic resonance images for high-precision radiation treatment of brain tumours

Physics and Imaging in Radiation Oncology, 2019
Background and purpose: In neuro-oncology, high spatial accuracy is needed for clinically acceptable high-precision radiation treatment planning (RTP).
Jurgen Peerlings, Inge Compter, Fiere Janssen, Christopher J. Wiggins, Alida A. Postma, Felix M. Mottaghy, Philippe Lambin, Aswin L. Hoffmann   +7 more
doaj   +1 more source

Glutathione and glutamate in schizophrenia: a 7T MRS study [PDF]

Molecular Psychiatry, 2018
In schizophrenia, abnormal neural metabolite concentrations may arise from cortical damage following neuroinflammatory processes implicated in acute episodes. Inflammation is associated with increased glutamate, whereas the antioxidant glutathione may protect against inflammation-induced oxidative stress.
Kumar, Jyothika, Liddle, Elizabeth B., Fernandes, Carolina C., Palaniyappan, Lena, Hall, Emma L., Robson, Siân E., Simmonite, Molly, Fiesal, Jan, Katshu, Mohammad Z., Qureshi, Ayaz, Skelton, Michael, Christodoulou, Nikolaos G., Brookes, Matthew J., Morris, Peter G., Liddle, Peter F.   +14 more
openaire   +4 more sources

Short Echo‐Time Spiral MRSI Versus Single‐Voxel Spectroscopy in the Human Brain at 3 Tesla With Semi‐LASER Localization

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Magnetic resonance spectroscopy techniques are widely used to non‐invasively study brain metabolism. Despite advances in magnetic resonance spectroscopic imaging (MRSI), there is a notable absence of research on comparing fast non‐Cartesian MRSI with single‐voxel spectroscopy (SVS), limiting our understanding of its performance and ...
Young Woo Park, Isaac M. Adanyeguh, Pierre‐Gilles Henry, Dinesh K. Deelchand   +3 more
wiley   +1 more source

Reconstruction of 7T-Like Images From 3T MRI

, 2016
In the recent MRI scanning, ultra-high-field (7T) MR imaging provides higher resolution and better tissue contrast compared to routine 3T MRI, which may help in more accurate and early brain diseases diagnosis.
Shi, Feng, Zong, Xiaopeng, Shin, Hae Won, Bahrami, Khosro, An, Hongyu, Shen, Dinggang   +5 more
core   +2 more sources

A Realistic In Silico Brain Phantom for Quantifying Susceptibility Anisotropy‐Induced Error in Susceptibility Separation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To create a realistic in silico brain phantom for positive and negative magnetic susceptibility that incorporates susceptibility anisotropy, enabling the evaluation of how susceptibility anisotropy influences susceptibility separation algorithm performance.
Daniel Ridani, Benjamin De Leener, Eva Alonso‐Ortiz   +2 more
wiley   +1 more source

7T雙埠靜態隨機存取記憶體

, 2011
[[abstract]]本專題提出一種7T雙埠SRAM，其主要包括記憶體陣列以及複數個控制電路（2），記憶體陣列由複數列記憶體晶胞與複數行記憶體晶胞所組成，每一列記憶體晶胞設置一個控制電路，且每一記憶體晶胞（1）由一NMOS 存取電晶體（M3）、二NMOS 驅動電晶體（M1和M2）及二PMOS 負載電晶體（P1和P2）、一讀取用位元線（RBL）、一讀取用字元線（RWL）及第一和第二讀取用電晶體（M4和M5）所組成。每一控制單元連接至對應列記憶體晶胞中之每一記憶體晶胞的二NMOS 驅動電晶體（M1和M2 ...
吳志彬;鄭濬哲
core