Washington University Medical School doctor working with patient, St. Louis, Missouri, 1945
![](https://49fe30bb3aa7406c16dc-5c968119d095dc32d807923c59347cc2.ssl.cf1.rackcdn.com/2012.019.614_1.jpg)
Photograph. Washington University Medical School doctor working with patient. Official Caption: "A doctor of the Washington University Medical School uses a so-called Geiger counter to measure, from the outside and practically without touching the patient, the relative amount of radioactive phosphorus deposited in the patient's liver during the treatment for a disease of the bone marrow. Most of the phosphorus is deposited in the marrow but an accurate check is necessary to avoid its excess in other organs. 6533-F." St. Louis, Missouri. 1945