Intraoperative Therapy – Intraoperative radiation therapy (IORT) delivers a
single, high dose of radiation therapy to a tumor bed during surgery and
can be applied to abdominal or pelvic tumors. This technology may help
eradicate residual tumor cells, reduce radiation treatment time and provide
an added radiation "boost" to external beam radiotherapy. The rationale
behind using IORT is delivering a high dose of radiation precisely to the
targeted area with minimal exposure to the surrounding normal tissues,
which are displaced or shielded during the IORT. IORT can be performed
both with electron beams (Intraoperative electron radiation therapy, IOERT)
and gamma-rays (Intraoperative brachytherapy radiation therapy, IOBRT).
IOERT (left) and IOBRT (right)
Stereotactic Radiosurgery (SRS)：
SRS is a targeting radiotherapy aimed at the tumor from many different angles and typically uses higher prescription doses than conventional radiation therapy. Using this method can effectively destroy small malignant tumors, suppress the growth of benign tumors, and close down abnormal blood vessels. This technique can be done on an outpatient basis. Stereotactic radiosurgery needs both the neurosurgeon and radiation oncology teams to work together.
Using SRS frame during CT simulation (left) and during patient SRS treatment (right)