2. Radiation dose. A flat-
panel detector has a far better
sensitivity to ionizing radiation
that is used to create medical
images. Typically, the flat-panel
detector is made of amorphous
silicon that is considerably more
radio sensitive. The C-arm
doesn't have to use as much
power — or what is referred to
as "technique" — to provide
higher quality images.
"By not using as much power,
it saves radiation exposure to the
patient and the OR staff because
there is less scatter," says Mr.
Alexander.
Scatter is the radiation that
comes off the patient and goes
out at a 90-degree angle toward
the physician and staff in the OR.
"So, with better collimation, we
can reduce radiation not only to
the patient but also to the staff in
the OR," says Mr. Perez.
Most surgeons go through a
radiation safety course before
using the C-arm, says Mr. Perez.
Surgeons study collimation — the
process by which a beam of radi-
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