RE 300 RADIATION STANDARDS, INCLUDING FALLOUT than educational ones and that most doctors will respond to appeal to their consciences and their intellects to do a better and better job. Representative Hosmer. Havethe doctors of the city of New York had their consciences and intellects appealed to in this connection? Dr. Cuamperrtarn. I think you can look at what Mr. Blatz is domg in a way in which much of what he found, I imagine, was unknown to the physicians and was an unwitting situation that could be improved. Representative Hosmer. Doesn’t the physician have an obligation to know the safety of the equipment that he uses on his patients # Dr. Cuampertarn. He should be as skilled and as knowledgeable as_ possible. Representative Hosmer. Yet Mr. Blatz in January 1962 in New York City inspected 393 X-ray machines in the offices of medical doctors in that city, and he found only 52 of these pieces of machinery in a satisfactory condition; 18 percent satisfactory, 87 percent unsatisfactory. Dr. Cuampervain. This, of course, has to do also with what the rules of satisfactory and unsatisfactory are. We did a similar survey m_ Philadelphia. Representative Hosater. Were Mr. Blatz’ rules unreasonable? Dr. Cuauperuain. No; they are reasonable. But they are of relative degree of importance. We did a similar study in Philadelphia and by critical standards about 75 percent of the apparatus did not meet what we liked it to. Representative Hosater. In that connection, Dr. Chamberlain, 2 veurs ago you testified that 6624 percent was out of whack. Dr. CuamMprrbarn. Exactly. Representative Hosmer. Are you correcting yourfigure? Dr. Cuamprrtatn. Thatis my nearest recollection, But the greater majority of those machines could be brought up to satisfactory condition with very minor changes which simply were not knownto the owners of the apparatus. Representative Hosarer. That survey was a control survey and was made about 614 years ago; is that right? Dr. Cuampertary. That one in Philadelphia? Representative Hosarer. Yes. Dr. CramBerLain. No; not that long ago. Representative Ilosmer. In 1960 you testified it was made about 414 years ago. Dr. CoamBrrtary. Was that the dental one or the medical one, sir? Representative Hosarer. That was the medical one. Dr. Cnampertain. I will take your word. I did not look that up in advance. Representative Flosarer. That was a control stucly, and it was sup- posed to be followed up. What happened in connection with followup? Dr. Crrampernaty. It has been followed up. I do not have figures. The dental one also. Representative Hoswrr. You say at the present time all of equipment in the city of Philadelphia has been inspected? Dr. Coamper.arn. T think at least 95 pereent of it has. I do know, again, the exact figure. the the the not Hereger hatte inte SESREES HBrsessieSetecapotatet sesh atioagah craegit