IMRT: Intensity-modulated radiation therapy is an advanced mode of radiotherapy that allows
computer-controlled radiation intensity to be changed (modulated) during treatment to support three-dimensional treatment
precision and accuracy.
Isocenter: A point in space defined by the intersection of
all the machine-based axis of rotation where radiation is directed in a highly reproducible and accurate way. The isocenter
remains constant and therefore is easily quality-assured on a routine basis. A single isocenter consists of many simultaneously
delivered beams of radiation.
Linear Accelerator: A machine that is used in radiation treatment that may also be called
a linac. It uses high energy x-rays to treat cancer.
Magnetic Resonance Imaging (MRI or MR): MRI provides three-dimensional, or multiplanar,
views of an internal organ or structure. MRI offers increased-contrast resolution, enabling better visualization of soft tissues
such as the brain and spinal cord.
Metastasis: This is when cancer cells in one place
(the breast, for example) spread to other parts of the body such as the liver, bones, lungs or brain.
Collimator (MLC): A device within a linear accelerator made up of tungsten leaves that can move independently to
provide conformal shaping of radiation beams.
Obs or Review Clinic: The weekly visit with the doctor or nurse while you are receiving
Oncologist: A physician who specializes in the diagnosis and treatment
Orthovoltage: A machine used in radiation treatment to treat cancers that
are on the surface, or close to the surface, of your body.
Palliative Care: The goal of palliative care is to improve the quality of life for people
with cancer and their families.
Radiation Treatment (or therapy): This is the use of radiation to destroy cancer cells.
The most common kinds of radiation used are high energy X-rays, gamma rays and electrons.
Radiosurgery is the delivery of a single high dose of radiation to a target in a single session by using multiple, focused,
finely collimated radiation beams with surgical precision.
Radiotherapy or Radiation Therapy:
The use of high-energy radiation from X-rays, gamma rays, neutrons and other sources to kill cancer cells and shrink tumors.
Red Blood Cells: The cells in the blood that carry oxygen to different parts of the body.
SBRT: Stereotactic body radiation therapy is a highly specialized form of external beam
radiation therapy combining advanced technology and expert technique. In SBRT, exact localization of tumors enables delivery
of precisely focused radiation at higher potency doses and over fewer treatments than conventional radiation therapy, to maximize
achievable outcomes with minimal collateral damage.
Simulation (or sim): The initial
planning of the radiation treatment that is done on a similar machine to the radiation machine.
The use of operating procedures to correct deformities, repair injuries, or remove certain diseased tissues.
X-ray: A form of electromagnetic radiation that creates images as x-ray particles pass
through the body.