Method and system for acquiring motional information of object i

Details Method and system for acquiring motional information of object i Method and system for acquiring motional information of object i

1987-12-21

1989-06-06

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Determine fluid flow rate

324309, G01R 3320

Patent

active

048375128

ABSTRACT:
A scan is performed by a multi-echo method using a static field applying unit, a gradient field applying unit and an RF pulse transmitter, so as to obtain first and second echo signals. The phases of the first and second echo signals are detected by echo signal detector. The first and second echo signals have the same phase with respect to an unmoving region, a difference of the phases of these two echo signals for the unmoving region becomes zero. The phase difference occurs only for a moving region, i.e., only at a point where the object is moving. Therefore, information on the motion of the object for those points where the phase difference occurs is calculated in a computer by performing the subtraction of the phases of the first and second echo signals at the same position. The result is displayed on display.

REFERENCES:
patent: 4574239 (1986-03-01), Singer
patent: 4683431 (1987-07-01), Pattany
patent: 4689560 (1987-08-01), Nayler
patent: 4724388 (1988-02-01), Sano

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