Radiation Oncology in the Jim & Susan Swenson Linear Accelerator Suite
Because of a generous donation from Jim and Susan Swenson, Mission Hospital
has a Radiation Oncology department as part of the treatment arsenal available
to cancer patients.
Radiation Oncology (also known as Radiation Therapy) is the process of
treating cancer with x-rays, gamma rays and charged particles. The treatment
can be used in a curative manner, to control disease, or to relieve symptoms
of the disease.
When a patient is referred for radiation therapy the process begins with
a consultation with our board certified Radiation Oncologist (a physician
with highly specialized and extensive training in Radiation Oncology).
After a careful physical exam and review of the patient’s medical
records with the patient, several treatment options may be offered. The
goal is to provide the education needed to make an informed decision about
A simulation is then performed using a state of the art CT scanner. This
process provides multiple three dimensional images which are used to create
a treatment plan. This treatment planning process includes mapping out
the area to be treated as well as identifying internal structures to be shielded.
The treatment planning system allows the Radiation Oncologist and the physicist
to create a predictive model of the treatment and limit or eliminate the
side effects to other portions of the body. Each treatment plan is unique
to a particular patient and reflects the on-going machine testing and
calibration by our physicists and physician research and collaboration
with other specialties.
The Linear Accelerator, a Siemens Artiste has 160 multi-leaf collimators
to restrict the radiation to the tumor, tumor bed and at- risk surrounding
tissue. This treatment machine has two-dimensional, three-dimensional
conformal, and intensity modulated radiation therapy capabilities (IMRT)
with on-board imaging for image guidance or IGRT. The patient’s
treatment is controlled by the treatment plan which is electronically
uploaded into the treatment machine. All treatments are checked, verified
and recorded electronically on a daily basis.
Our patients are monitored frequently by the Radiation Oncologist and our
registered Radiation Oncology Nurse during their course of treatment.
Other options available are High Dose Radiation Therapy or HDR used to
treat breast and gynecological cancers.
For appointments, please call (949) 364-1400, ext. 7230.