The first Co-60 machine was built in Canada in 1951.

The source-axis distance in Co-60 machines is 100 cm.

A linear accelerator can accelerate electrons to energies between 4-18 MeV in X-ray mode.

Cobalt-60 teletherapy machines use a steel shell with lead for shielding purposes.

A magnetron is used to generate microwave radiation in a linear accelerator.

The penumbra trimmers in a teletherapy machine are placed as close as possible to the patient’s skin to reduce blurriness.

Linear accelerators use a traveling wave accelerator tube for producing high-energy electrons.

A flattening filter is used to make beam intensity uniform in a linear accelerator.

Multileaf collimators are used to conform the treatment fields to the tumor volume.

Klystrons are used to decrease the amplitude of microwaves in a linear accelerator.