scholarly journals Organ-Specific Recommendations for Increasing Temperature- To-Noise Ratio of Magnetic Resonance Thermometry Using Dual-Pathway Sequences at 1.5T, 3T, and 7T during Guidance of Thermal Therapies

2019 ◽  
Author(s):  
Pelin ÇİRİŞ
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Thermometry ◽  
Thermal Therapies ◽  
Organ Specific ◽  
Dual Pathway ◽  
Noise Ratio ◽  
Increasing Temperature

scholarly journals Magnetic resonance thermometry using a GdIII-based contrast agent

2021 ◽  
Vol 57 (14) ◽  
pp. 1770-1773
Author(s):  
S. A. Amali S. Subasinghe ◽  
Jonathan Romero ◽  
Cassandra L. Ward ◽  
Matthew D. Bailey ◽  
Donna R. Zehner ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agent ◽  
Contrast Agents ◽  
Resonance Imaging ◽  
Magnetic Resonance Thermometry

The complexes described here serve as contrast agents for magnetic resonance imaging thermometry.

A printed Yagi–Uda antenna for application in magnetic resonance thermometry guided microwave hyperthermia applicators

2017 ◽  
Vol 62 (5) ◽  
pp. 1831-1847 ◽  
Author(s):  
M M Paulides ◽  
R M C Mestrom ◽  
G Salim ◽  
B B Adela ◽  
W C M Numan ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Thermometry ◽  
Microwave Hyperthermia

scholarly journals Optimization of Curvilinear Needle Trajectories for Transforamenal Hippocampotomy

2016 ◽  
Vol 13 (1) ◽  
pp. 15-22 ◽  
Author(s):  
David B. Comber ◽  
E. Bryn Pitt ◽  
Hunter B. Gilbert ◽  
Matthew W. Powelson ◽  
Emily Matijevich ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Medial Axis ◽  
Tumor Resection ◽  
Percutaneous Treatment ◽  
Thermal Therapy ◽  
Foramen Ovale ◽  
Worst Case ◽  
Seizure Disorders ◽  
Thermal Therapies ◽  
Concentric Tube Robot

Abstract BACKGROUND: The recently developed magnetic resonance imaging–guided laser-induced thermal therapy offers a minimally invasive alternative to craniotomies performed for tumor resection or for amygdalohippocampectomy to control seizure disorders. Current laser-induced thermal therapies rely on linear stereotactic trajectories that mandate twist-drill entry into the skull and potentially long approaches traversing healthy brain. The use of robotically driven, telescoping, curved needles has the potential to reduce procedure invasiveness by tailoring trajectories to the curved shape of the ablated structure and by enabling access through natural orifices. OBJECTIVE: To investigate the feasibility of using a concentric tube robot to access the hippocampus through the foramen ovale to deliver thermal therapy and thereby provide a percutaneous treatment for epilepsy without drilling the skull. METHODS: The skull and both hippocampi were segmented from dual computed tomography/magnetic resonance image volumes for 10 patients. For each of the 20 hippocampi, a concentric tube robot was designed and optimized to traverse a trajectory from the foramen ovale to and through the hippocampus from head to tail. RESULTS: Across all 20 cases, the mean distances (errors) between the hippocampus medial axis and backbone of the needle were 0.55, 1.11, and 1.66 mm for the best, mean, and worst case, respectively. CONCLUSION: These curvilinear trajectories would provide accurate transforamenal delivery of an ablation probe to typical hippocampus volumes. This strategy has the potential both to decrease the invasiveness of the procedure and to increase the completeness of hippocampal ablation.

Quantitative, Organ-Specific Interscanner and Intrascanner Variability for 3 T Whole-Body Magnetic Resonance Imaging in a Multicenter, Multivendor Study

2016 ◽  
Vol 51 (4) ◽  
pp. 255-265 ◽  
Author(s):  
Christopher L. Schlett ◽  
Thomas Hendel ◽  
Jochen Hirsch ◽  
Sabine Weckbach ◽  
Svenja Caspers ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Whole Body ◽  
Resonance Imaging ◽  
Organ Specific ◽  
Body Magnetic Resonance Imaging

scholarly journals Magnetic Resonance Thermometry at 7T for Real-Time Monitoring and Correction of Ultrasound Induced Mild Hyperthermia

PLoS ONE ◽  
2012 ◽  
Vol 7 (4) ◽  
pp. e35509 ◽  
Author(s):  
Brett Z. Fite ◽  
Yu Liu ◽  
Dustin E. Kruse ◽  
Charles F. Caskey ◽  
Jeffrey H. Walton ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Real Time ◽  
Real Time Monitoring ◽  
Mild Hyperthermia ◽  
Magnetic Resonance Thermometry

Proton magnetic resonance studies at 220 MHz of alanine transfer RNA

1969 ◽  
Vol 47 (4) ◽  
pp. 480-484 ◽  
Author(s):  
Ian C. P. Smith ◽  
Tetsuo Yamane ◽  
R. G. Shulman
Keyword(s):  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Chemical Shifts ◽  
Transfer Rna ◽  
Magnetic Resonance Studies ◽  
The Common ◽  
Line Widths ◽  
Increasing Temperature ◽  
Magnetic Resonance Spectra

Proton magnetic resonance spectra at 220 MHz of alanine transfer RNA do not permit assignments of individual peaks due to each of the common bases; only a peak attributable to protons at position eight in adenine can be assigned with certainty. Measurements of the relative areas of proton magnetic resonance peaks due to the base and ribose-1′ protons indicate that the ribose moieties of tRNA are not involved in bonds stronger than those experienced by the bases. Proton magnetic resonance peaks attributable to the methyl and dihydro protons of the rare bases can be distinguished in the 220 MHz spectra; the variation of their line widths and chemical shifts with increasing temperature indicates that the rare bases are located in regions of the alanine transfer RNA molecule which are more highly organized than indicated by an open cloverleaf model.

scholarly journals Performance of compressed sensing for fluorine‐19 magnetic resonance imaging at low signal‐to‐noise ratio conditions

2019 ◽  
Vol 84 (2) ◽  
pp. 592-608
Author(s):  
Ludger Starke ◽  
Andreas Pohlmann ◽  
Christian Prinz ◽  
Thoralf Niendorf ◽  
Sonia Waiczies
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Compressed Sensing ◽  
Signal To Noise Ratio ◽  
Resonance Imaging ◽  
Signal To Noise ◽  
Noise Ratio
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