The SSDL-ININ Mexico dosimetry audit network experiences

In the Mexican Republic there are currently around 125 radiotherapy centers that provide treatments with external photon beams and brachytherapy. With the purpose of contributing to the quality of the physical dosimetry for these treatments, the SSDL-ININ organizes postal audit programs through three main activities: 1) In the case of external radiation beams, annually, about 10% of radiotherapy centers are selected to participate in the IAEA's and the ININ's postal audit programs, in terms of absorbed dose to water D_w, 2) Pilot program of Dw postal audit for brachytherapy in low and high dose rate, to the energy of ¹³⁷Cs and ¹⁹²Ir, respectively, 3) Postal audit program for verification of SBRT and IMRT treatments, The SSDL-ININ is a part of the IAEA/WHO network of secondary standards laboratories since the 1970s, and continually it has participated in the coordination of the IAEA's dosimetry audits in Mexico. In 2006, the SSDLININ developed the infrastructure for the implementation of a D_w pilot postal audit program parallel to that offered by the IAEA.