Nuclear magnetic resonance tomography apparatus and method

Surgery – Truss – Pad

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128721, 324309, 324312, A61B 505

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active

047796200

ABSTRACT:
A nuclear magnetic resonance tomography apparatus generates a tomographic image substantially free from artifacts caused by body movement, such as respiration, during acquisition of the tomography signals. The tomography signals are acquired and stored in the form of Fourier lines in an image matrix. For reducing image artifacts, a control unit is provided for controlling entry of the acquired tomography signals into the matrix in dependence upon a repiratory signal obtained from a sensor. The control unit insets the Fourier lines in the matrix such that Fourier lines occurring when the respiratory signal exceeds a predetermined value are alternately inserted above and below the middle of the matrix proceeding from the matrix middle, and the remaining Fourier lines are inserted into the matrix above and below the matrix middle proceeding from an edge of the matrix.

REFERENCES:
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patent: 4532474 (1985-07-01), Edelstein
patent: 4614195 (1986-09-01), Bottomley et al.
"Magnetic Resonance Imaging With Respiratory Gating: Techniques and Advantages", Ehman et al., American Journal of Radiology, vol. 143, Dec. 1984, pp 1175-1182.
"Hereditary Hemorrhagic Telangiectasia: Sonographic Findings in the Liver.sup.1," Cloogman, et al. Radiology, Feb. 1984, pp. 521-522.

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