Radiation therapy techniques on Varian TrueBeam STx
18 January 2021
18 January 2021
Radiation therapy at the "Oberig" clinic is performed on a linear accelerator TrueBeam STx, which allows you to implement all existing radiological techniques: IMRT, stereotactic radiosurgery, RapidArc, or VMAT as well as radiation under visual control - IGRT.
This means that we can choose the best treatment for each patient, including irradiation of tumors of complex shape and those that move - for example, during inhalation-exhalation - without harm to surrounding organs and tissues.
IGRT is a visualization to monitor cancer treatment immediately before each session. In "traditional" radiation therapy, doctors simulate the tumor at the beginning and use this data to plan the entire course of treatment. The patient's anatomy, size and shape of the tumor may change during therapy. With the help of IGRT, doctors can monitor changes and, if necessary, adjust the treatment plan during sessions.
The IMRT technique minimizes damage to adjacent healthy tissues. Tumors have an irregular shape, but conventional radiation treatment involves direct radiation. This means that although the entire tumor receives radiation, any healthy tissue near the tumor can also receive radiation. IMRT technology allows you to deliver "rays" with greater accuracy and avoid side effects. Also, this technique allows you to treat tumors of complex shape.
RapidArc or VMAT is the latest technique of radiation therapy, which helps to irradiate the tumor with millimeter accuracy in the required dose and not to damage the surrounding healthy tissues due to the dynamic field and movement of the accelerator - the source of radiation. Used for tumors of any shape and significantly reduces the duration of the session.
Before each session (as well as during the session if necessary) is performed Cone-Web CT (CBCT) - CT imaging of the internal organs of the patient directly on the treatment table. Carried out to control the accuracy of dose delivery to millimeters and to correct the position when necessary.
RapidArc can be used to treat tumors:
Head and neck (salivary gland, larynx, tongue, nasopharynx, etc.)
Lungs and pleura
Rectum and anal canal
Metastatic lesions of the bones of the skull
Metastatic lesions of the meninges of the brain.