Radiosurgery

Radiosurgery is an advanced, non-invasive treatment method using high-energy ionizing radiation for the precise destruction of diseased tissues, most often neoplastic or vascular. Unlike classical surgery, it does not require an incision, and the therapeutic effect is achieved through the concentrated action of radiation on a strictly defined area. This technique is a combination of radiotherapy and neurosurgery, providing high spatial accuracy with minimal damage to healthy tissues. Radiosurgery is used, among others, in the treatment of brain tumors, vascular malformations, and some skin lesions, constituting an important element of modern precision medicine.

Radiosurgery – what is it

Radiosurgery is based on the use of a single or several high doses of ionizing radiation, which are precisely directed at the lesion using advanced imaging systems (e.g., computed tomography or magnetic resonance imaging). A key element of this technology is high spatial precision, achieved through stereotactic systems that enable localization of the lesion with millimeter accuracy.

The mechanism of action of radiosurgery involves:

damaging the DNA of pathological cells,
inhibiting their ability to divide,
inducing apoptosis (programmed cell death),
gradually reducing the volume of the lesion.

In clinical practice, radiosurgery is mainly used in:

the treatment of brain tumors (benign and malignant),
the therapy of cancerous metastases,
the treatment of neuromas, meningiomas,
closing arteriovenous malformations,
the therapy of trigeminal neuralgia.

The most important advantages of this method include:

no need for hospitalization or its minimal duration,
reducing the risk of surgical complications,
the possibility of treating lesions that are difficult to access surgically,
high effectiveness while preserving the function of surrounding tissues.

Radiosurgery does not cause immediate removal of the lesion – the therapeutic effect develops gradually over weeks or months, which constitutes a significant difference compared to classic surgical methods.

Radiosurgery – types

Radiosurgery involves several technologies that differ in the way radiation is generated and delivered; however, they are all based on the principle of maximum dose concentration within the lesion while simultaneously protecting healthy tissues.

The most important types of radiosurgery include:

1. Stereotactic Radiosurgery (SRS)

The most commonly used form, primarily used in the treatment of intracranial lesions. It is characterized by a single administration of a high dose of radiation.

used in the treatment of brain tumors and metastases,
requires very precise planning,
utilizes head stabilization systems.

2. Fractionated Stereotactic Radiotherapy (FSRT/SBRT)

It involves delivering radiation in several smaller doses (fractions).

used in the treatment of larger lesions or those located outside the brain,
allows for better protection of healthy tissues,
is used, among others, in the treatment of lung, liver, or spinal tumors.

3. Gamma Knife System

A technology utilizing gamma radiation sources (cobalt-60).

dedicated to the treatment of brain lesions,
ensures exceptional precision,
primarily used in functional neurosurgery.

4. CyberKnife System

A robotic radiosurgery system utilizing X-ray radiation.

enables the treatment of lesions in various locations of the body,
allows for tracking tumor movement (e.g., in the lungs),
does not require rigid patient stabilization.

5. Linear Accelerators (LINAC)

The most versatile devices used in radiosurgery and radiotherapy.

used in the treatment of lesions throughout the entire body,
allow for various irradiation techniques,
widely available in oncology centers.

In summary, radiosurgery represents one of the most advanced tools of modern medicine, combining the precision of imaging technology with the effectiveness of oncological treatment. Its development follows the trend of personalized therapies, minimizing the burden on the patient while maintaining high therapeutic efficacy.