Journal of Medical Physics and Applied Sciences

The Structural Shielding of the New Radiotherapy Bunker at the General Hospital of Yaounde in Cameroon: An Enhancement of Radiation Protection

The purpose of the this work is the assessment of the new radiotherapy bunker and structural shielding to better enhance radioprotection and reducing the rate of mortality of cancer patients at the General Hospital of Yaoundé (GHY) Cameroon. We used data from the Cobalt-60 machine (60Co), Linear Accelerator (LINAC) and measurements done on the new radiotherapy bunker. From our results and analyses, with the Tenth Value Layer (TVL) for 90° scattered radiation, doors with 6.5 mm thickness of lead would reduce the weekly dose as follows: From 490 μSv·week^–1 to around 49 μSv·week^–1 case of ⁶⁰Co; From 435 μSv·week–1 to around 43 μSv·week^–1 case of 6 MeV Linac; From 289 μSv·week–1 to around 28 μSv·week^–1 case of 18 MeV Linac, which are well within the design dose limit (120 μSv·week^–1, 6 mSv/a) very acceptable.

Author(s):

Tetchoka Manemo Cedric, Samba Ngano Odette, Alain Jerve Fotue, Chi Emmanuel and Lukong Cornelius Fai

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