Numerous studies are guided to develop shorter and quicker strategies that diminish the dependence of factors like fatigue or learning, or increase the reliability through statistical analysis. Another objective has been to improve the sensibility with different wave longitudes. However in many occasions the Hospitals take in consideration other factors when deciding the acqui- Numerous studies are leading to develop shorter and quicker strategies that diminish the dependence of factors like fatigue or learning, or increase the reliability through statistical analysis. Another objective has been to improve the sensibility with different wave longitudes. However in many occasions the Hospitals take in consideration other factors when deciding the acqui-