LINEAR ACCELERATORS CLINAC - Models: Clinac IX; Novalis; Unique; Trilogy; Clinac Linear Radiotherapy Accelerator; Linear High Energy Radiotherapy Accelerator Clinac. Anvisa Registry: 10405410012; 10405410016; 10405410020; 10405410011; 10405410001; and 10405410010. Models that have Clinac software prior to version 7, which do not use a secondary system to read the position of the collimator and treatment table.