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Paper Information

Journal:   ASIA OCEANIA JOURNAL OF NUCLEAR MEDICINE AND BIOLOGY   NOVEMBER 2014 , Volume 2 , Number SUPPLEMENT 1; Page(s) 43 To 44.
 
Paper: 

SELF SHIELDED MEDICAL CYCLOTRON- INITIAL EXPERIENCE IN DEVELOPING COUNTRY

 
 
Author(s):  SINGH DHANANJAY K.*
 
* DR.RMLIMS
 
Abstract: 

Background: At present 18 cyclotrons are in operation and few are in process and will get commissioned in next 1-2 year time in India. In a Medical Cyclotron, radiation safety aspects are more stringent due to neutron, high energy gamma radiation and because of this the occupational workers of facility are very sceptical about radiation exposure. The objective was to access the production capability of cyclotron under different circumstances, radiation safety of facility and occupational workers.
Materials and Methods: Our Medical Cyclotron (RDS Eclipse-
RD, Siemens Medical Solution having 11 MeV fixed energy) are capable to produce F-18, F18-F2 gas, N-13, C11 and O-15 radioisotopes. The radiation monitoring of facility were doing routinely and every time before beam initialization, during production and post production around the self shield and outside of secondary wall of cyclotron room and radiochemistry room.
Results: The mean duration of bombardment in there run on the F-
18 target was 40±10.57 Min, while for N-13 target was 15±5.21 min and for F-8-2 gas target was 90±20.53 min. Radiation levels in the cyclotron vault are varies from 0.03 to 65 (mSv/hr) micro Sievert per hour. The neutron dose rate was not in the detectable range just before and after the production run in the cyclotron vault.
Conclusion: The radiation (gamma and neutron) levels were well with the permissible limit except during the leakage of F-
18 F-2 gas target or C-11 gas target.

 
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