The Beatson West of Scotland Cancer Centre in Glasgow, Scotland, UK, has performed the first radiosurgery treatment for two small brain metastases in a single treatment, using the high intensity mode on Varian Medical Systems’s TrueBeam STx linear accelerator.

Beatson West of Scotland Cancer Centre clinical oncologist Dr. Brian Clark said reducing the time the patient spends on the treatment couch is easier on the patient and also reduces the opportunity for movement during the treatment, which helps enhance precision.

"The RapidArc planning capability and superior imaging enable us to achieve very high precision, giving us the confidence to deliver such a high dose in a single session to carry out what is effectively a non-invasive technique on small brain metastases."

"Without the TrueBeam system’s high intensity mode the patient would have received single-fraction fixed beam radiosurgery, taking 45-60 minutes to deliver, with all the inherent problems of potential movement," Clark added.

In addition to the high intensity mode, physicians at the cancer centre have also used Varian’s RapidArc technology for continuous dose delivery.

Beatson West of Scotland Cancer Centre radiotherapy physics head Garry Currie said as soon as the TrueBeam system was installed the centre wanted to start utilising the high intensity mode together with RapidArc to deliver higher doses in a single treatment session.

"The RapidArc planning capability and superior imaging enable us to achieve very high precision, giving us the confidence to deliver such a high dose in a single session to carry out what is effectively a non-invasive technique on small brain metastases," Currie added.

The cancer centre is planning to use the technique for all radiosurgical treatments, including SABR stereotactic radiosurgery, following the success of the TrueBeam high intensity mode treatments carried out so far, according to Garry Currie.

The Beatson West of Scotland Cancer Centre treats more than 7,000 patients each year on 11 Varian medical linear accelerators.