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Image Guided Brachytherapy (IGBT)

Brachytherapy is a mode of cancer treatment by insertion of radioactive implants directly into the tumour, thereby allows delivery of higher doses of radiation to tumours and sparing toxicity to surrounding normal tissues. It is commonly used as an effective treatment in cervical, head and neck, endometrial, vaginal, breast, esophageal, skin and sarcomas.

Historically 2-dimensional brachytherapy utilized X-ray based treatments planning. With the evolution of Image Guided Brachytherapy (IGBT) and utilization of  CT/MRI/PET CT for target delineation and planning led to better local control and reduction in side effects.

Advantages of IGBT:

  1. Verification of tandem placement in the uterine cavity and decreasing the risk of treating a patient with a uterine perforation
  2. The ability to use more combined intracavitary/interstitial techniques (Vienna applicator) for locally advanced disease to achieve better coverage of gross disease while sparing normal tissue
  3. Helps to have a better understanding of the doses delivered to other normal tissues at risk, especially the small bowel, and the potential to spare dose to these organs
  4. Optimized target coverage and normal tissue dose with adaptive replanning based on tumor response.

Image Guided Brachytherapy