Megavoltage x-rays also have higher relative biological effectiveness than orthovoltage x-rays.
2.
In addition, these orthovoltage machines ( 300 kvp ) were not designed to be mobile.
3.
For these reasons, the centers rejected IO orthovoltage ( X-rays ) radiation therapy machines.
4.
Lower energy x-rays, called orthovoltage X-rays, are used to treat more superficial cancers.
5.
Superficial and orthovoltage X-rays have application for the treatment of cancers at or close to the skin surface.
6.
Therefore beginning in the 1920s " orthovoltage " 200 & ndash; 500 kV x-ray machines were built.
7.
Orthovoltage X-rays, which used tube voltages of 200-500 kV, began to be used during the 1920s.
8.
IORT treatments with low energy or " orthovoltage " X-rays gained advocates throughout the 1930s and 1940s, but the results were inconsistent.
9.
With the introduction of linear accelerators in the 1970s, which could produce 4-30 MV beams, orthovoltage x-rays are now considered quite shallow.
10.
It has 17 radiation treatment machines, all of which are equipped with the latest technologies including IMRT and VMAT, a superficial orthovoltage machine, and operates a Gamma Knife ( Perfexion ) stereotactic radiosurgery machine in collaboration with Toronto Western Hospital.
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