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- W1967799467 abstract "Les champs, magnétiques produits par le corps humain ont été étudiés, dans les dix dernières années, surtout grâce aux magnétomètres supraconducteurs ou SQUID. Dans cet article on fait une bréve description des principaux types des signaux biomagnétiques étudiés. Ensuite on décrit soit l'instrumentation supra-conductive utilisée, soit les principales techniques de mesure. Enfin on passe en revue les résultants les plus importants obtemus dans les derniers tepms dans les différents laboratoires engagés dans ce domaine. Magnetic fields generated by the human body have been studied in the last ten years thanks to superconducting magnetometers or SQUIDs. So far, signals connected to the activity of the heart, brain, muscles and those due to the presence of magnetic impurities in the lungs have been studied. Because of the extremely small amplitude of the signals to be detected (down ro 10−10 Gs with respect to a magentic background of the order of 1 Gs), the greatest part of the efforts during the early 70s was devoted to the construction and optimization of sophisticated instrumentation. Two main ways have been followed: the former consists in the construction of magnetically shielded environments to lower the magnetic background by several orders of magnitudes: the letter consists of the use of magnetic sensors employing an appropriate geometrical configuation. This allows a rejection of spurious magnetic fields down to levels compatible with those of biomagnetic signals. After this first stage, a systematic utilization of this technique has been started in the biomedical field. At present in many countries and physicians are working together in order to fully exploit the actual power of the method. In this paper the most remarkable results so far obtained in the physiological and clinical fields are presented." @default.
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- W1967799467 date "1979-11-01" @default.
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- W1967799467 title "Superconducting instrumentation for biomagnetism" @default.
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- W1967799467 doi "https://doi.org/10.1016/0140-7007(79)90086-0" @default.
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