scholarly journals Mapping magnetization transfer saturation (MT sat ) in human brain at 7T: Protocol optimization under specific absorption rate constraints

2021 ◽  
Author(s):  
Hampus Olsson ◽  
Mads Andersen ◽  
Ronnie Wirestam ◽  
Gunther Helms
Keyword(s):  
Human Brain ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Magnetization Transfer ◽  
Specific Absorption ◽  
Protocol Optimization ◽  
Rate Constraints

scholarly journals Quick Reduction of Specific Absorption Rate Constraints in Parallel RF Excitation Pulse Design by Maximum Volume Inscribed Ellipsoids

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Kurt Majewski
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Resonance Imaging ◽  
Maximum Volume ◽  
Specific Absorption ◽  
Single Constraint ◽  
Power Domain ◽  
Radio Frequency Excitation ◽  
Frequency Excitation ◽  
Rate Constraints

In medical magnetic resonance imaging, parallel radio frequency excitation pulses have to respect a large number of specific absorption rate constraints. Geometrically, each of these constraints can be interpreted as a complex, centered ellipsoid. We propose to replace a collection of such constraints by the single constraint which corresponds to the associated maximum volume inscribed ellipsoid and implies all original constraints. We describe how to compute this ellipsoid via convex programming. Examples show that this reduction has very short computation times but cuts away parts of the feasible power domain.

Incorporating specific absorption rate constraints into wireless signal design

2014 ◽  
Vol 52 (9) ◽  
pp. 126-133 ◽  
Author(s):  
Bertrand M. Hochwald ◽  
David J. Love ◽  
Su Yan ◽  
Patrick Fay ◽  
Jian-Ming Jin
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Signal Design ◽  
Specific Absorption ◽  
Wireless Signal ◽  
Rate Constraints

Variability of Specific Absorption Rate of Human Body for Various Configurations of Tablet Computer in Vicinity of Abdomen

2015 ◽  
Vol E98.B (7) ◽  
pp. 1173-1181 ◽  
Author(s):  
Akihiro TATENO ◽  
Tomoaki NAGAOKA ◽  
Kazuyuki SAITO ◽  
Soichi WATANABE ◽  
Masaharu TAKAHASHI ◽  
...  
Keyword(s):  
Human Body ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Tablet Computer ◽  
Specific Absorption
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