Surgery – Truss – Pad
Patent
1987-02-19
1988-11-08
Smith, Ruth S.
Surgery
Truss
Pad
324306, 324309, A61B 505
Patent
active
047828390
ABSTRACT:
NMR tomography permits identification of flowing matter within a closed body, as there is a reduction in signal intensity as a consequence of a saturation of the magnetization in the area of a slice that has been excited for imaging, while freshly inflowing matter has not experienced this saturation and consequently provides a stronger signal. Special excitation sequences permit either virtually complete saturation of stationary tissue, and thus particularly strong emphasis of flowing matter, or excitation of stationary and flowing matter in different zones and with differing intensities, thereby enabling very precise quantitative and even directional flow measurements to be performed.
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Leon Kaufman, PhD et al, Investigative Radiology: Evaluation of NMR Imaging for Detection and Quantification of Obstructions in Vessels, No. 17, 1982, pp. 554-560.
Science, vol. 221: Nuclear Magnetic Resonance Blood Flow Measurements in the Human Brain, pp. 654-656 1983.
Biomedizinische Technik, vol. 30, No. 1-2/1985, K. Barth et al: Visualization and Measurement of Flow with Magnetic Resonance Imaging, pp. 12-17.
Hennig Jurgen
Muri Marcel
Smith Ruth S.
Spectrospin AG
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