Van Roosenbeek, E R Modifications to improve safety with teletherapy units. [electronic resource] - The American journal of roentgenology, radium therapy, and nuclear medicine Mar 1972 - 631-5 p. digital Publication Type: Journal Article ISSN: 0002-9580 Standard No.: 10.2214/ajr.114.3.631 doi Subjects--Topical Terms: Cobalt Isotopes--therapeutic useHumansMethodsProtective Devices--instrumentationRadiation Injuries--prevention & controlRadiation MonitoringRadiation ProtectionRadioisotope TeletherapyRadiotherapy DosageTechnology, Radiologic