In 1925,the Harvard physician Herman Blumgart injected a solution of a radioactive gas,radon,into the arm vein of a patient “to measure the velocity of the circulation”. He measured the time it took for the tracer to pass through the heart and lungs and reach the opposite arm.His experiment was little noted at the time but is of great historic interest.It was the first time a physiological process had been measured with a radio-active tracer,making the measurements with an externally-placed radiation detector directed at a part of the body of a living human being.
KeywordsJohns Hopkins Hospital Scarlet Fever Softball Game Bowling Alley Catholic High School
Unable to display preview. Download preview PDF.