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Dynamic Targeting IGRT/Image Guided Radiotherapy


IGRT - or image-guided radiotherapy - refers to the use of sophisticated imaging technologies to guide the delivery of precise forms of radiation therapy. Dynamic Targeting IGRT/Image Guided RadiotherapyTumors can move during treatment (usually due to patient respiration) and between treatments (usually due to day-to-day variations in patient setup). Dynamic Targeting IGRT from Varian Medical Systems offers clinicians advanced imaging techniques to verify patient position and tumor position at the time of treatment. 

Knowing the exact tumor location allows clinicians to reduce the amount of tissue treated. The tumor can be more accurately targeted, sparing more of the surrounding healthy tissue, reducing side effects, and ultimately, improving the patient's quality of life. In some cases, it makes it possible to deliver higher radiation doses to the tumor, increasing the likelihood of local tumor control. 

Dynamic Targeting IGRT translates into faster outpatient treatments, greater patient comfort, and the potential for better outcomes and fewer side effects. 

Downloadable IGRT FAQ's PDF


Tissues, organs, and many tumors are not rigidly fixed in one position; they move around inside the body due to natural physiological processes. Dynamic Targeting IGRTFor this reason, they are not always in the exact same position each time a patient is positioned for treatment. In addition, tumors can move several centimeters due to a patient's normal respiratory cycle.

For Dynamic Targeting IGRT, the medical linear accelerator, or treatment machine, is outfitted with a number of sophisticated imaging devices that provide the clinician with images that help to guide the treatment.

An X-ray system mounted on a robotic arm is rotated around the body to gather images that pinpoint a tumor's exact location just prior to treatment. These images are then compared with reference images (MRI, CT or other kinds of scans) in order to determine if the tumor is where it is expected to be, or off by some margin. Sophisticated software programs calculate how to move the patient so that the tumor is directly in the center of the treatment beam.


Patient Benefits of Using IGRTA diagnosis of cancer is overwhelming for anyone. But at [Institution Name], we've opened the door to a new generation of cancer care. By adding Dynamic Targeting IGRT, we can now precisely treat tumors and avoid healthy tissue. Our computer-controlled targeting capabilities mean a better chance of cure with fewer side effects. 

  • Over 60% of cancer patients receive some form of radiotherapy as part of their treatment. This is because radiotherapy is very effective at controlling many forms of cancer by destroying cancer cells' ability to reproduce.
  • Through more precise targeting of the beam, dosage levels can be increased and target volumes (the three-dimensional areas to receive treatment) can be reduced - so tumors get a higher dose of radiation and healthy surrounding tissues get very little.
  • Imaging and tracking technologies that are used in delivering IGRT enable doctors to treat tumors even if they are close to vital structures like the spinal column, salivary glands, heart, or lungs. This can mean substantially fewer side effects and a much better post-treatment quality of life.


Physician Benefits of Using IGRT

  • Dynamic Targeting IGRT is an advanced and versatile cancer treatment that can enhance radiotherapy treatment precision and allow physicians to escalate the radiation dose to cancer cells while keeping the dose to surrounding tissues a low as possible. This increases the chances of eradicating the tumor and minimizing treatment side effects.
  • Dynamic Targeting IGRT offers physicians imaging techniques to verify patient position and tumor position at the time of treatment.