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Miss Gisela Kosswig, a technical assistant at the Max-Plank institute for Biophysics in Frankfurt, sits in the patient�s chair inside the steel chamber of the new Gamma-Ray spectrometer at the institute in Frankfurt, Germany on January 25, 1961. Over her is the spectrometer�s head. The patient wear pyjamas specially made and dry-cleaned by the institute to ensure complete freedom from radioactive materials. The spectrometer measures and analyses the amount, kind and exact location of radio-active substances in the human body. It cost about £31,500 to build. (Photo by AP Photo)
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