Method for preparing <68>Ge sealed radioactive source
A radiation source and purpose technology, applied in the field of medical devices, can solve the problems of affecting imaging quality, poor radiation resistance, and changes in dose distribution, and achieve good adsorption effect, good uniformity, and improved accuracy
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Embodiment 1
[0019] 68 The preparation method of Ge sealed radioactive source is made up of the following steps:
[0020] In a 15mL square quartz reaction bottle, put 2g of 120-mesh silicon dioxide as an adsorbent, add 5mL of sulfuric acid aqueous solution with a concentration of 10mol / L, and a radioactive concentration of 3mCi / mL 68 Ge aqueous solution 0.6mL, fix the reaction bottle on the rotary oscillator, under normal pressure, rotate and oscillate at a speed of 40 rpm for 60 minutes, take out the supernatant, wash the precipitate with deionized water for 3 times, and then use Wash it twice with acetone, dry it, put it into the stainless steel tube 1, weld the two ends, set the sealed stainless steel tube in the casing 2 and assemble it on the base 3, and then make a 68 Ge sealed radioactive source. The utilization rate of radioactive germanium-68 is 97%.
Embodiment 2
[0022] 68 The preparation method of Ge sealed radioactive source is made up of the following steps:
[0023] In a 15mL square quartz reaction flask, put 2g of 80-mesh silicon dioxide as an adsorbent, add 5mL of sulfuric acid aqueous solution with a concentration of 15mol / L, and a radioactive concentration of 3mCi / mL 68 Ge aqueous solution 0.6mL, fix the reaction bottle on the rotary oscillator, under normal pressure, rotate and oscillate at a speed of 30 rpm for 120 minutes, take out the supernatant, wash the precipitate with deionized water for 3 times, and then use Cleaned twice with ethanol, dried, put into stainless steel tube, welded at both ends, set the sealed stainless steel tube in the sleeve and then assembled on the base, that is to make a 68 Ge seals the radioactive source. The utilization rate of radioactive germanium-68 is 95%.
Embodiment 3
[0025] 68 The preparation method of Ge sealed radioactive source is made up of the following steps:
[0026] In a 15mL square quartz reaction bottle, put 1.5g of 200-mesh silicon dioxide as an adsorbent, add 5mL of sulfuric acid aqueous solution with a concentration of 9mol / L, and a radioactive concentration of 3mCi / mL 68 Ge aqueous solution 0.6mL, fix the reaction bottle on a rotary oscillator, under normal pressure, rotate and oscillate at a speed of 45 rpm for 30 minutes, take out the supernatant, wash the precipitate with deionized water for 3 times, and then use Cleaned twice with ethanol, dried, put into stainless steel tube, welded at both ends, set the sealed stainless steel tube in the sleeve and then assembled on the base, that is to make a 68 Ge seals the radioactive source. The utilization rate of radioactive germanium-68 is 96%.
[0027] The wall thickness of the stainless steel pipes in Examples 1-3 is 0.1 mm.
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