External Beam Radiation Therapy (EBRT)

External Beam Radiation Therapy (EBRT)

External Beam Radiation Therapy refers to the delivery of tightly targeted radiation beams from outside the body; it is the most frequently used type of radiation therapy.

A course of EBRT involves several daily treatments (fractions) over a few days to a several weeks. It is a non-invasive method of delivering radiation to a tumour. The radiation beams are shaped as they come out of the treatment instrument, the linear accelerator; before they reach the patient thus ensuring they are carefully directed at the cancer.

Intensity Modulated Radiation Therapy (IMRT)

IMRT is a special form of EBRT involving the delivery of hundreds of small radiation beams with different intensities, entering the body from a number of different angles. It is very precise and with the support of our experienced radiation oncology team can enable higher doses to be given safely, without causing damage to the surrounding organs thus increasing the chance of a cure and disease remission.

Image-Guided Radiation Therapy (IGRT)

IGRT involves repeat imaging of the tumour during treatment. It is used in nearly all treatments to ensure treatment delivery accuracy. IGRT also allows the treatment team to see small changes in tumour or organ shape, size and position, enabling the treatment team to make necessary adjustments to radiation delivery during or between daily treatments. This ensures that the cancer cells remain targeted while reducing radiation exposure to healthy cells.

Stereotactic Radiosurgery (SRS)

SRS is used to treat small tumours with well-defined edges. It is particularly useful for cancers in the brain or spine. In SRS treatments, a single high dose of radiation is delivered to the tumour with the assistance of highly accurate imaging and planning. A head frame is usually required for brain treatments to ensure the patient stays completely still.

Stereotactic Body Radiation Therapy (SBRT)

SBRT delivers very high dose radiation focally to small tumours outside of the spine or brain. Immobilisation of the body is critical, and small movements that may affect the precise delivery of the treatment, such as breathing, are taken into account. For this reason, SBRT is usually given in several slightly lower dose treatments across several sessions.

Accelerated Partial Breast Irradiation (APBI)

Accelerated partial breast irradiation (APBI), is a localised form of radiation treatment (known as brachytherapy) that involves the insertion of a radioactive source to kill breast cancers cells that may remain after lumpectomy surgery. APBI delivers a high-dose of radiation while greatly reducing the required treatment time, and the dose to normal breast tissue and critical organs such as the heart and lungs

OUR THERAPIES – GammaKnife® Radio Surgery

Gamma Knife® radiosurgery (GKS) is a safe, effective and non-invasive procedure that uses radiation to treat conditions in and around the brain. It is sometimes used as a replacement for conventional surgery, but at other times it may be effective in situations where there is no conventional surgical alternative available. The radiation treatment is delivered with great precision to the target tissue within or around the brain, whilst at the same time minimising any dose to surrounding healthy tissue. The name 'Gamma Knife' is in some ways misleading - no knife or cutting implement is involved at any stage. It uses radiation in much the same way as a surgeon uses a knife.

The Gamma Knife is located at our Macquarie University Private Hospital clinic. For more information please follow this link.


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GenesisCare is largest provider of radiation oncology in Australia, the UK and Spain, and also the leading provider of cardiology and sleep treatments in Australia. We exist to fill the treatment gap for the biggest disease burdens – cancer and heart disease – in an environment of substantial unmet demand from an ageing population. Click here to learn more