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2. Please provide all supporting documentation supporting the summary fact sheets provided tothe Subcommittee. The individual fact sheets which were used t o prepare the summary fact sheets are provided .(Vol umes 1-8)
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3. Regarding fact sheet numbered SFS1.002: a.) What were the results of these tests ? b.) What tracking and documentation was maintained on Lese subjects after the 21 day and 4 month period? c.) Please identify the health status, names and addresses of each participant of these studies who Is, o r Is thought t o be, still The results of the Ra-224 and Th-234 studies are presented inMIT reports 952-1 and 952-3 which are attached t o Fact Sheet No. 118 (Volume 1). Very briefly,the data show about 20 percent absorption o f radium but only 0.02 percent absorption o f thorium, The radium that is absorbed localizes in the skeleton. Because o f the short half - lives (3.66 days for Ra-224 and 24.1 days for Th-234), the small doses administered and t h e very low absorption o f thorium, no late effects were expected, and there was no long-term A report on the current status o f persons Involved inthe Ra-224 and attempted through telephone conversations with Drs. Robley Evans and Constantine Maletskos. These scientists held professorial positions a t MIT and were the principal investigators on this project. the study was t o mimic radionucltdes known t o be present Inthe paint used inthe radium dial industry t o which a large population of workers Dr. Maletskos worked with MIT legal staff for about one year I n designing aw rl tten agreement o f consent for the volunteers t o sign. He also spent considerable time explalnlng the details of the study and the reasons behind It tothe persons at the New England Center for Aging. YBecause ofthe short physical half - life of the radium isotope and the very low gastrointestinal absorption of the thorium, there was no reason t o follow the patients beyond the point at which measurements were possible." Detailed records of thls study may be found i n the HIT Archives, but history on the pattents beyond the period o f measurement would have remained property o f the Center for Aging. This institution i s no longer I n existence and Dr. Maletskos had "no idea how any records of survival history could be obtained." He stated that finding one ofthe patients, if still alive, may be ' like doing a missing
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persons search." The youngest volunteer w u l d be approaching 85 years living might be possible, but would be very time consuming and He implied that finding any person from the study still There was no doubt i n the minds of either Dr. Evans or Dr. Maletskos that any radiation doses received by the volunteer patients would have been inconsequential to their health. willing to discuss the study in detail with those interested. Either former professor wuld be