' 182 present in bone following yttrium, plutonium, radium. strontius, These were similar. We were able to pick these up from the clinical standpoint by areas of inreased density which usually occurred at the cancellous bones at the end of the long bones. We were able to correlate this with the amount of retained radium, and it was a more reliable clinical indicator than any other findings that we found. Washington, D. C Alderson Reporting Company The other important thing is that in the tumors that 10 developed tn these people, most 11 ends of the long bones and a roentgenographic study of the 12 long bones gives a base line for any future changes, 13 also a study for any changes in symptoms which might be 14 pre-cancerous. 15 all of them developed at the and All these radium patients follow a rather fixed 16 pattern, namely, that about 15 years after the deposition of 17 the radio element symptoms occurred. 18 occur and wre consistent at the point where the chamber 19 develops. 20 Then later symptoms wil J This is accompanied by areas of density. This is avery important aspect as far as the long term study, as 21 far as the internal emitters are concerned. 22 I know you are interested in radiatimas far as 23 X-rays are concerned. ARC 24 I looked up the data from Brookhaven on a.40 to 80 KV machine, and foond that takim for instance, 25 a survey of atypical fibula, this would give you a .12 y ‘ Tnearsy roentgens to this part. Ce = my ees C1500." Taking a book on burns, the tibia, /%.