scholarly journals Magnetic Resonance RF Pulse Design by Optimal Control With Physical Constraints

2018 ◽  
Vol 37 (2) ◽  
pp. 461-472 ◽  
Author(s):  
Armin Rund ◽  
Christoph Stefan Aigner ◽  
Karl Kunisch ◽  
Rudolf Stollberger
Keyword(s):  
Optimal Control ◽  
Magnetic Resonance ◽  
Pulse Design ◽  
Physical Constraints ◽  
Rf Pulse

scholarly journals Time optimal control‐based RF pulse design under gradient imperfections

2019 ◽  
Vol 83 (2) ◽  
pp. 561-574 ◽  
Author(s):  
Christoph S. Aigner ◽  
Armin Rund ◽  
Samy Abo Seada ◽  
Anthony N. Price ◽  
Joseph V. Hajnal ◽  
...  
Keyword(s):  
Optimal Control ◽  
Time Optimal Control ◽  
Pulse Design ◽  
Time Optimal ◽  
Rf Pulse ◽  
Gradient Imperfections

scholarly journals Magnetic Resonance Radiofrequency Pulse Design by Optimal Control

2018 ◽  
Author(s):  
Armin Rund ◽  
Christoph Aigner ◽  
Karl Kunisch ◽  
Rudolf Stollberger
Keyword(s):  
Optimal Control ◽  
Magnetic Resonance ◽  
Pulse Design ◽  
Radiofrequency Pulse

2D RF pulse design for optimized reduced field-of-view imaging at 1.5T and 3T

2021 ◽  
Author(s):  
Orhun Caner Eren ◽  
Bahadir Alp Barlas ◽  
Emine Ulku Saritas
Keyword(s):  
Field Of View ◽  
Pulse Design ◽  
Rf Pulse

scholarly journals Adiabatic RF pulse design for Bloch-SiegertB+ mapping

2012 ◽  
Vol 70 (3) ◽  
pp. 829-835 ◽  
Author(s):  
Mohammad Mehdi Khalighi ◽  
Brian K. Rutt ◽  
Adam B. Kerr
Keyword(s):  
Pulse Design ◽  
Rf Pulse

scholarly journals Parallel excitation in the human brain at 9.4 T counteractingk-space errors with RF pulse design

2010 ◽  
Vol 63 (2) ◽  
pp. 524-529 ◽  
Author(s):  
Xiaoping Wu ◽  
J. Thomas Vaughan ◽  
Kâmil Uğurbil ◽  
Pierre-François Van de Moortele
Keyword(s):  
Human Brain ◽  
Pulse Design ◽  
Parallel Excitation ◽  
Rf Pulse

Magnetic Resonance Imaging: Comparative Study of Radiofrequency Pulse Techniques in the Evaluation of Focal Cerebral Ischemia

Neurosurgery ◽  
1985 ◽  
Vol 16 (4) ◽  
pp. 502-510 ◽  
Author(s):  
Joseph M. Zabramski ◽  
Robert F. Spetzler ◽  
Benjamin Kaufman
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Focal Cerebral Ischemia ◽  
Spin Echo ◽  
Pulse Sequences ◽  
Artery Occlusion ◽  
Primate Model ◽  
Cross Sectional ◽  
Tissue Contrast ◽  
Rf Pulse

Abstract The recently developed technique of magnetic resonance (MR) imaging utilizes radiofrequency (RF) radiation in the presence of a strong magnetic field to provide cross sectional displays of body anatomy similar to computed tomography, When utilizing MR, the operator alters tissue contrast electronically by changing RF pulse sequences. The three most frequently used RF pulse sequences are partial-saturation (PS), inversion-recovery (IR), and spin-echo (SE). We evaluated the sensitivity of these RF sequences to detect ischemic changes in our primate model. Serial MR scans were carried out using all three pulse formats 5 to 60 hours after middle cerebral artery occlusion (MCAO) in four animals. SE- and IR-sequenced proton MR images readily identified areas of evolving infarct 5 to 6 hours after MCAO, whereas PS scans that were performed during this acute period appeared normal. From 24 to 60 hours after MCAO, PS-sequenced scans showed focal areas of progressively decreasing signal intensity. However, SE and IR scans performed at the same intervals always demonstrated more extensive tissue changes. The basis of MR imaging, the effects of altering RF pulse sequences, and the resulting interpretation of changes observed in MR sections are presented. (Neurosurgery 16: 502-510, 1985)

scholarly journals Optimal control theory for applications in Magnetic Resonance Imaging

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Eric Van Reeth ◽  
Helene Ratiney ◽  
Marc Lapert ◽  
Steffen J. Glaser ◽  
Dominique Sugny
Keyword(s):  
Magnetic Resonance Imaging ◽  
Optimal Control ◽  
Magnetic Resonance ◽  
Control Theory ◽  
Optimal Control Theory ◽  
Resonance Imaging
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