Dr. Tejinder Kataria Chairperson Radiation Oncology
Volumetric Modulated Arc Therapy, is a technique in which the therapy machine rotates 3600 around a person with a constant change into energy output and shape modification of its jaws (collimators).
The advantage of such a technique is that a the treatment is completed within three to eight minutes.
This helps the tumor stay within the planned dose envelope besides keeping the patient comfortable.
Stereotactic Body Radiation Therapy (SBRT) is a type of external beam radiotherapy that uses special equipment to position a patient and precisely deliver radiation to tumours in the body (except the brain). This is best suited for cancers that move with breathing. The total radiation dose is delivered in five or fewer fractions and offers unique results compared to conventional treatments. This technique is most widely used to treat lung and liver cancer.
Stereotactic radiosurgery treats brain tumors with a precise delivery of a ‘single’ high dose of focused radiation in a single session. SRS relies on 3D imaging that determines the exact co-ordinates of the tumor inside the body and a high degree of immobilization with the help of skeletal fixation device (SRS frame). Radiosurgery produces such a dramatic effect in the target zone that the changes are considered to be “surgical”. This high degree of precision minimizes side effects to a great extent.
Intensity modulated radiation therapy is a technique in which the energy deposition within the tissue is modified as the radiation is passing through the body. This modification in energy permits reduction in the total dose received by the surrounding healthy tissues around the cancer. The treatment is delivered with the help of a linear accelerator with multileaf collimator that help shape and modify the intensity of radiation. The patient benefits by reducing chances of radiation toxicity.