![]() ![]() It will be a scientific break trough if it is a fact. May be he has used some hither to unknown screens or image enhancing technologies. SPEC also offers enriched Iridium-192 as an alternative for customers who. It will be interesting to know the parameters claimed to have been used for making these radio graphs. Iridium-192 provides contrast sensitivity for thicker materials (1 inch 25.4 mm). Producing any reasonable radio graph with more than 2 density and due sensitivity with the kind of exposure times required, is beyond the known theory or practice. Iridium-192 provides contrast sensitivity for thicker materials (1 inch 25.4 mm). This means that an Iridium source of 100 Ci strength becomes only 0.006 Ci after penetrating 14 half value layers. Most commonly used isotope for industrial radiography because of its versatility. The half value layer of Ir-192 in steel is about 13mm.ġ90 mm of steel has about 14 half value layers. Re: Radiography with IR-192 In Reply to Nigel Armstrong at 00:18 Jun-08-2014. All patients with primary tumors were treated by a combination of external megavoltage irradiation and interstitial iridium-192 implants, whereas patients. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, India, Joined Jan 2003, R & D, NDT tecniques metallurgy TAKEN VRS FROM THE POSITION OF SR. I cannot force the fabricator to change their radiation source if I’m presented with acceptable films… I just need a confirmation from any of the experts out there and if possible, a technical reference, that Ir-192 DEFINITELY CANNOT penetrate 190 mm steel thickness. However now as the client’s rep, I think it’s pushing it if we want to use Ir-192 to penetrate 190 mm of steel. This field experience somehow denies the “text book knowledge” that Ir-192 can only be used up to with 76 mm thick of steel. All of the above requirements were somehow met.īack in my days as RT operator, I too had personally conducted RT using Ir-192 on a 95 mm thick weld (SWSI) and the result met ASME V IQI and density requirements. RT as per ASME I only requires that the density is achieved, IQI is achieved and the Ug doesn’t exceed 1.8 mm. The pipe-to-pipe header weld joints were constructed as per ASME I requirements. Conclusion: It appears that low dose platinum infusional chemotherapy can be added safely to patients receiving interstitial iridium-192 implants along with interstitial hyperthermia for head and neck malignancies. Re: Radiography with IR-192 In Reply to Nigel Armstrong at 01:53 Jun-06-2014. ![]()
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