The Varian TrueBeam™ STx is a revolutionary innovation in cancer treatment. It expands radiotherapy treatment options for even the most challenging cancer cases in the lung, breast, head and neck, abdomen, liver and other regions.
The system uses sophisticated 3D imaging to target and treat tumours of all shapes, sizes and locations with pinpoint accuracy. Images can be generated using 25% less x-ray dose. These images are used to fine-tune a patient’s position prior to and during the treatment process.
The precision of the system is measured in increments of less than a millimetre. This accuracy is made possible by the system’s sophisticated architecture, which synchronises imaging, patient positioning, motion management, beam shaping and dose delivery. The system performs accuracy checks every ten milliseconds throughout the entire treatment.
It offers the following therapy options:
a. 3D Conformal Radiation Therapy
Three-dimensional conformal radiation therapy uses a CT simulator to create three-dimensional maps of a tumour and the surrounding tissue which helps oncologists use the targeting information to focus precisely on the tumour, while avoiding healthy surrounding tissues.
b. Intensity-modulated Radiation Therapy (IMRT)
IMRT is an advanced mode of high-precision radiotherapy that uses computer-controlled linear accelerators to deliver precise high radiation doses to a malignant tumour or specific areas within the tumour while minimising the dose to surrounding normal critical structures. IMRT allow the radiation dose to conform more precisely to the three-dimensional (3-D) shape of the tumour by modulating – or controlling – the intensity of the radiation beam in multiple small volumes.
c. Volumetric Modulated Radiation Therapy (VMAT)
VMAT is an advanced form of IMRT that delivers a precisely-sculpted 3D dose distribution with a 360-degree rotation of the gantry in a single or multi-arc treatment. VMAT can deliver the dose to the entire tumour in a 360-degree rotation, typically in less than two minutes. It uses special software and an advanced linear accelerator to deliver IMRT treatments up to eight times faster than what was previously possible. The algorithm ensures treatment precision, helping to spare surrounding healthy tissue.
d. Image-guided Radiation Therapy (IGRT)
IGRT is the use of frequent imaging during a course of radiation therapy for the purpose of improving the precision and accuracy of the delivery of treatment. It is used to treat tumours in areas of the body that move, such as the lungs.
e. Stereotactic Radiosurgery (SRS)
SRS is a non-surgical radiation therapy used to treat functional abnormalities and small tumours of the brain. It can deliver precisely-targeted radiation in fewer high-dose treatments than traditional therapy, which can help preserve healthy tissues.
f. Stereotactic Body Radiation Therapy (SBRT)
SBRT is a non-surgical radiation therapy used to treat tumours on the body. It can deliver precisely-targeted radiation in fewer high-dose treatments than traditional therapy, which can help preserve healthy tissue.
HDR allows clinical oncologists to deliver the radiation quickly during an outpatient procedure. In HDR, applicators are placed in or adjacent to the cancer tissue after which a computer driven apparatus, called a remote after loading device, transfers the radiation source through the catheters to the tumour site. The source remains in place for a predetermined amount of time. When the desired dose has been achieved, the remote afterloading device withdraws the radioactive source.
This innovative therapy is administered at the time of surgery (lumpectomy or colorectal surgery), following cancer removal. INTRABEAM IORT is delivered using a miniaturised radiation device which is inserted into the tumour bed. Therapeutic radiation is then directed immediately and precisely right where it is needed most – the location where the cancer was removed. Localising the radiation on the tumour bed is effective because studies show that this is where cancer is most likely to recur.
The Gamma Knife is not a conventional surgical knife in the traditional sense. In fact, there are no knives or scalpels involved, no incisions made. This “knife” refers to an array of 192 precise beams of gamma radiation that produces a powerful dose of concentrated radiation when converged at the treatment site. It targets tumours and abnormalities, stunting their growth and shrinking them over time while sparing the surrounding healthy brain tissues.
This advanced radiation technique provides an outpatient treatment option to patients suffering from brain conditions that typically requires surgery. It is an alternative method for a number of conditions whereby an open neurosurgery may be highly risky or not practicable. It can be used to treat a number of neurological disorders including brain metastases, arteriovenous malformations, facial nerve pain (trigeminal neuralgia), meningioma, acoustic neuromas, gliomas and pituitary tumours.