Orthovoltage
Orthovoltage radiotherapy is a treatment with x-rays. Orthovoltage refers to the energy range of the x-rays used typically 200-500kV range. The x-rays are strong enough to kill cancer cells but do not penetrate more than a few millimetres beyond the surface of the skin. Orthovoltage is an excellent alternative to surgery for skin cancer where surgery might be difficult or disfiguring, such as the face.
![Orthovoltage Orthovoltage](http://www.envirotectltd.co.uk/wp-content/uploads/2013/09/leadplaster3.jpg)
Lead plasterboard
Forms a complete shielded envelope to the room. The shielding usually extends to the full structural height of the room.
![Orthovoltage Orthovoltage](http://www.envirotectltd.co.uk/wp-content/uploads/2013/11/1.5-leadlined.jpg)
1.5 Lead lined door
A 1.5 leaf door set is usually used for patient entrance. This allows the passage of the patient trolley.
![Orthovoltage Orthovoltage](http://www.envirotectltd.co.uk/wp-content/uploads/2014/02/Kings-College-Dental-screens-10910-768x1024.jpg)
Single door set
A single door set is required as passage from the scanner room to the control room.
![Orthovoltage Orthovoltage](http://www.envirotectltd.co.uk/wp-content/uploads/2013/11/Obs-Window-2.png)
Viewing window
Shielded frame and lead glass window enables the operator to see procedures from the control room.