The basic cognitive function and QOL of 150 oncologic patients that undergone Radiotherapy or Radiosurgery treatment to the brain due to primary tumor, metastases or increased risk of brain metastases, will be assessed at 3 time points: before the treatment, immediately after the treatment, and on the next follow up visit. The assessment tools that will be used are Neurotrax standard cognitive computerized tests and 2 short questionnaires.Patients that will receive a one-day treatment will be tested on 2 time points only- before the treatment and on FU.The research will reveal the positive and the negative influences of the Radiotherapy, along with the assessment of norms for the cognitive function and quality of life of oncologic patients being treated by RT.Eligibility criteria:oncologic patients of both genders, with primary brain tumors, metastases or with increased risk of brain metastases, that are referred to conformal/palliative or preventive Radiotherapy treatment or to Stereotactic Radiosurgery, who are able to follow instructions in Hebrew.The participants will be 20-80 years old.Main comparisons will be performed between the cognitive tests results on 3 time points mentioned. The study will continue until the needed number of participants will be achieved.