In 1896 a German physics professor, Wilhelm Conrad Roentgen, presented the idea of the "X-ray", within a short period of time systems were being built to use the "x-ray"diagnosis and within three years it was developed to be used as a treatment for cancer.
  Radiation therapy initially used low radium with low-voltage diagnostic machines. A major discovery took place in France, in which it was concluded that a daily dosage of radiation for several weeks increased the chance of diminishing the patients' cancer.

  It was later that discovered in the early 20th century that radiation may also cause another type of cancer. Due to this horrific discovery, scientists made major advancements in the last quarter of the 20th century in  radiation physics and computer technology, they managed to aim radiation precisely to hit its target.To this day, radiation is being used as one of the solutions for  cancer patients.  [Citation 35]