It was then considered to develop additional criteria and recommendations for the new advanced technologies in the form of a supplement to the existing protocol. The general criteria and procedures given in TECDOC-1151 are still valid for basic radiotherapy equipment, widely disseminated and playing an important role in clinical practice in the region. To fulfill this goal, a specific task was included in the IAEA regional project ''Improvements in Quality Assurance in Radiotherapy in the Latin American Region'' (ARCAL XC), running during the period 2007-2009, where a group of experts was formed and commissioned with the document revision. Technological advances and improvements have created the need for a thorough revision of the protocol to reflect the current situation regarding radiotherapy equipment and techniques, keeping it a suitable and practical tool to guarantee high quality in the nowadays rather complex radiotherapy treatments. Since the publication of TECDOC-1151, the status of radiotherapy has changed significantly in many of the radiotherapy institutions in the Latin American region. The recommendations and guidelines of the document were also applied in other countries having a similar level of development in radiotherapy.
![tecdoc ecuador tecdoc ecuador](https://i1.rgstatic.net/publication/330970404_Analisis_por_difraccion_de_Rayos_X_de_ceramica_recolectada_en_los_sitios_arqueologicos_Rumipamba_y_La_Florida_Quito_Ecuador_tecdoc/links/5c5de09592851c48a9c37dc4/largepreview.png)
The document found broad application and was widely adopted in the region.
![tecdoc ecuador tecdoc ecuador](http://tecdoc.bovsoft.com/download/changes_in_ver_5.3.0-1.jpg)
This was the first document of this type published entirely in Spanish, having a marked practical approach, and focused on the situation of the radiotherapy in Latin America at that time. One of its more relevant contributions was the development of a quality control protocol for radiotherapy physics, published as an IAEA TECDOC. An International Atomic Energy Agency (IAEA) regional project for Latin America (ARCAL XXX) entitled ''Improvement of Quality Assurance in Radiotherapy'' was completed in 2000.