TEGO sss 286 RADIATION STANDARDS, INCLUDING FALLOUT STATEMENT OF RICHARD CHAMBERLAIN,’ PROFESSOR OF RADIOLOGY, UNIVERSITY OF PENNSYLVANIA Dr. CHAMBERLAIN. Thank you,sir. I have given you a prepared statement. Would you lke for meto extract what I think are the salient features from it rather than read it? Representative Prics. I think that would perhaps be better and the complete statement will be included in the record. Dr. Cuamper.aIn. Thank you,sir. In looking at the situation, particularly as it may have changed in the past 2 years, or aS we may appreciate it better with regard to Teagan TSE ROS exposures Involved in medical practice, I think that it is of interest. to continue to try to get assessments as to the amounts of both gonadal and somatic exposures. We do not at this time have any nationwide reliable statistical study on this feature, that I am aware of at least in the United States, that is based on modern statistical methods. However, some very important studies have come out of the Western European countries, notably the Adrian report out of England, which is of great interest and which was beautifully done. The interesting thing about all of these studies, and particularly the Adrian Committee report from the United Kingdom,is that the present estimates of these countries, as to the amountof radiation involved in medical and dental exposures, is considerably less than the earlier estimates. In the general appreciation of what is being done in the United States in regard to radiological work, I think it is reasonable to presume that quite likely the earliest estimates in the United States mayalso be somewhat high. But we simply do not have figures on this, that I am aware of. There are several things that are changing these figures all the time. I personally doubt if the exact figure is of very great importance. It is of interest because of the comparison with other 1 Richard H. Chamberlain, M.D,, professor of radiology and chairman, Department of Radiology, School of Medicine, University of Pennsylvania. Professor of radiology, Graduate School of Medicine, University of Pennsylvania. Born May 25, 1915. Jacksonville, Fla. Home eddress: 8327 Germantown Avenue, Philadelphia, Pa. A.B., 1934, Centre College, Danville. Ky.: M.D., 1939, University of Louisville School of Medicine; internship, 1939-40, Louisville City Hospital: fellowship in radiology, 1940-42, Hospital of the University of Pennsylvania; 1942-46. active service with the U.S. Army, chief of radiology service, 24th Station Hospital and Nichols General Hospital. Consultant in radiology. U.S. Air Development Center, Johnsyville, Pa. Consultant-lecturer, U.S. Navy Hospital, Philadelphia, Pa. Consultant in therapeutic radiology, Veterans’ Administration Hospital, Philadelphia, Pa. Visiting professor of radiology, University of Lund, Sweden, 1956. Member, National Committee on Radiation Protection. Member, Executive Committee, NCRP. Member, Subcommittee No. 1, NCRP. Member, International Commission on Radiological Units. Member, NAS-NRC Committee on Pathologic Effects of Atomic Radiation. Member, National Advisory Council on Radiation of the U.S. Public Health Service, 1958 to 1960; Chairman, Subcommittee of National Advisory Council on Radiation to Review Training Grants for Training Radiological Health, AEC and State Department consultant on nuclear affairs to Poland. 1958. Teehnical adviser to Second International Conference on Peaceful Uses of Atomic Energy, 1958. Former member, Committee on Isetope Distribution of AEC. Former Chairman, AEC Subcommittee on Human Applications of Radioactive Isotopes. Chairman, Civilian Advisory Committee on Radiation Hazards and Safety, city of Philadelphia. Chairman, Radiation Safety Committee, University of Pennsylvania. Societies: American College of Radiology (fellow, American College of Radiology: ehairman, commission on radiclogical units, standards, and pretection, 1953-60; acting chairman, 1960, member 1961 to present); Radiological Society of Nerth Amerien (Carman lecturer, 1952, first vice president, 1957); American Medical Association (representative, scientific exhibit) : American Roentgen Ray Society: American Radium Society ; Philadelphia County Medical Society (chairman, committee on radiation medicine ; member, committee on cancer), ete. HHA ADIOSnaeey RQSee TE CHEATEC