Surgery – Truss – Pad
Patent
1991-07-03
1994-01-04
Smith, Ruth S.
Surgery
Truss
Pad
324306, 324309, A61B 5055
Patent
active
RE0344958
ABSTRACT:
A slice selection gradient magnetic field used in a pulse sequence for generating a spin echo signal is applied in such a fashion that its polarity at the time of a 90.degree. pulse becomes opposite to the one at the time of 180.degree. pulse, in order to expand a dynamic range of blood flow speed measurement. When the blood flow speed contains a component in a slice vertical direction, the gradient magnetic field in the slice vertical direction is adjusted so that the phase changes of two sets of flow encoded pulses contained in the slice vertical direction are opposite to each other.
The flow speed in the direction of the readout gradient magnetic field, which is a lateral direction of the slice plane, is purely measured by canceling influences of the flow in the slice vertical direction.
REFERENCES:
patent: 4384255 (1983-05-01), Young et al.
patent: 4451788 (1984-05-01), Edelstein et al.
patent: 4516582 (1985-05-01), Redington
patent: 4532473 (1985-07-01), Wehrli
patent: 4595879 (1986-06-01), Lent et al.
patent: 4683431 (1987-07-01), Pattany et al.
Koizumi Hideaki
Ozawa Yasuhiko
Sano Koichi
Sato Shin'ichi
Takeda Ryuzaburo
Hitachi , Ltd.
Smith Ruth S.
LandOfFree
NMR imaging method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with NMR imaging method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NMR imaging method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-298006