CNS Tumors
Proton radiotherapy differs from photon radiotherapy by the absorption of ionizing radiation in the tissues. In the area of medium and low doses of radiation, proton radiotherapy has a better dose distribution, while in the area of high doses proton radiotherapy has a similar dose distribution as compared to photon radiotherapy. Low and medium doses of radiation are a source of late and very late side effects of radiotherapy. Therefore the use of proton radiotherapy should be considered in situations where the patient is expected to recover and to have a long life expectancy. Another situation in which the use of protons is appropriate is when the cancer located near healthy tissues, which can be damaged by conventional radiation, or when photon radiotherapy does not allow the application of safe doses sufficient to eradicate the tumor.
Radiotherapy plays an irreplaceable role in the treatment of CNS cancers. In indicated cases, irradiation improves the results after radical or partial resection or for inoperable tumours.
Advantages of proton therapy in CNS tumor irradiation:
- Allows to significantly reduce the dose of unwanted radiation to the brain and thus prevent the risk of memory disorders.
- Allows to significantly reduce the doses to the optic nerves, thus reducing the risk of vision reduction or loss.
- Reduces the risk of hearing impairment or loss, especially in the high frequency range.
- Reduces the risk of damage to mental and hormonal functions.
- Reduces the likelihood of developing secondary tumors.