Some of the tools for this had been around for a hundred years, but it had only been used as a diagnostic technique until the 1980s, when there was changes in camera technologies and things like that, that allowed this to be done for real operations.
Parte do instrumental existía dende había centos de anos pero só se utilizara como técnica de diagnóstico ata os 80, cando se produciron cambios nas cámaras e en material similar, que lles permitiu utilizalas para operacións reais.