NEW YORK UNIVERSITY MEDICAL CENTER R Institute of Environmental Medicine . 550 FIRST AVENUE, NEW YORK, N.Y, 10016 “AREA 212 679-3200 401647 ANTHONY I. LANZA RESEARCH LABORATORIES AT UNIVERSITY VALLEY LONG MEADOWROAD, STERLING FOREST, TUXEDO, N.Y, MAIL AND TELEPHONE ADDRESS: 550 FIRST AVENUE, NEW YORK, N.Y, 10016 April 18, 1977 'Dr. Robert A. Conard Medical Department Brookhaven National Laboratory Upton, New York oy 11973 . , Dear Bob: I apologize for the delay in mailing out the external whole body counting results on Drs. However, as I mentioned, we are still awaiting the results of thea bioassay measurements of concentrations of plutonium and americium in their urines. At any rate, since it's been: some time since their visit to our lab, I'll report on the in vivo measurements in this letter and send you the results of thebioassay when they become available. Drs. arrived at the Institute of Environmental Medicine on 11 March 1977 to undergo whole body and thorax counting procedures for isotopes of plutonium and/or americium. General occupational histories for each individual were recorded, and measurements of some of the more important anthropomorphic parameters are given in Table 1. Three independent counting procedures were employed for each subject. The initial measurement for all persons who -are counted in this laboratory consists of a modified meterarc geometry with the subject sitting in a standardized stainless steel. chair. An 8"x4" NaI(T1) crystal detector is emplayed ta quantitate the presence of photons of energy greater than 100 keV including normal activities from K-40 that is present in the body. Both subjects were thus counted for a total of 30 minutes each in this geometry. Results of these measurements are then utilized along with other information for selection of a series of control subjects who have no history of possible radionuclide contamination. ‘Figures 1 and 2 give the gamma-ray pulse height for Drs. respectively ‘and illustrate what was determined quantitatively, i.e., that PRIVACY ACT MATERIAL REMOVED Wi 5288 «Ors