| 摘要 |
PCT No. PCT/JP85/00370 Sec. 371 Date Feb. 21, 1986 Sec. 102(e) Date Feb. 21, 1986 PCT Filed Jul. 2, 1985 PCT Pub. No. WO86/00706 PCT Pub. Date Jan. 30, 1986.A method and apparatus are disclosed for nuclear magnetic resonance imaging utilizing the Fourier transform imaging scan sequence, with measurement data being obtained from which the offects of variations in the static magnetic field are eliminated. The method and apparatus are characterized by measurement of view data G(k,t) for a body which is under diagnosis under the condition that there is a specific value of twist of spin phase within the body, in a specific direction, measurement of the view data G(-k,t) for the body which is under diagnosis under the condition that the value of twist of the spin phase within the body is equal in amount and of opposite direction to the aforementioned value of twist of spin phase, with the time which elapses between the measurements of G(k,t) and G(-k,t) being made sufficiently short that any change in the static magnetic field occurring therein can be ignored, deriving from the view data G(k,t) and G(-k,t) the data G(k,t0) and G(-k,-t0), for the respective time points t0 and -t0 which are mutually symmetrically disposed with respect to the time origin, deriving the complex conjugate &upbar& G(- &upbar& k,- &upbar& t0) of the data G(-k,-t0), deriving the ratio A which is equal to G(k,t0)/ &upbar& G(- &upbar& k,- &upbar& t0), and correcting measured data by a signal which is proportional to the argument arg(A) of the ratio A.
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