This information relates to the physical properties of superficial and orthovoltage X-Ray beams produced by X-Ray tubes in the energy range of 10 kV to 300 kV.
The concept of using X-Ray beams to actively target abnormal tissues is not a new one; equipment first became available for clinical use in the late 1890’s and continued to be the most popular means of generating therapeutic X-Rays until the advent of linear accelerators and teletherapy equipment in the 1950’s. This led to a reduction in the use of superficial and orthovoltage therapy equipment. The relatively low cost, simplicity and low maintenance for such equipment provides adequate rationale for its use in treating surface lesions or those at shallow depths, and in so doing, absorbs some of the clinical oncology workload.
In the modern radiotherapy department, any technique which helps increase capacity on the Linac® is very useful.