Lung cancer radiotherapy:

Lung cancer is cancer that begins in
the lungs, the two organs found in the
chest that help you breathe.

The lungs are made up of areas called
lobes. The right lung has three lobes;
the left lung has two, so there's room
for the heart. When you breathe, air
goes through your nose, down your
windpipe (trachea), and into the lungs
where it spreads through tubes called
bronchi. Most lung cancer begins in
the cells that line these tubes.

There are two main types of lung
cancer:

Non-small cell lung cancer (NSCLC) is
the most common type of lung cancer.
Small cell lung cancer makes up about
20% of all lung cancer cases.


CYBERKNIFE
The problem with conventional
radiotherapy is that some tumors are
close to critical structures, such as
blood vessels or vital organs, which
can be damaged by radiotherapy over
a number of treatment sessions. In
some cases, the oncologist has to tell
the patient that it would not be safe.
The CyberKnife technology has two
advantages in terms of accuracy:
Because it uses pencil-thin beams of
radiation to attack the tumor, it does
not damage surrounding healthy
tissue, and because of this, they can
use much higher doses of radiation to
blast the tumor from many angles
In Europe a survey of the cost of
radiotherapy among EU member states
showed it to be 3,000 euros approx.
USD 3,600.00, compared with 7,000
euros USD 8,400.00) for surgery and
17,000 euros (USD 20,400.00) for
chemotherapy. It is clearly
cost-effective, particularly compared
with the high cost of newer cancer
drugs such as Herceptin.

VARIAN'S TRILOGY SYSTEM
combines the capabilities of other
external beam  radiation technologies
-- including Cyberknife, Tomotherapy,
and Novalis;