CLEAR-Pb®
Compensation Filters eliminate
the problems inherent
in imaging a wide range
of densities on one radiograph.
Because they are far superior,
they replace the bulky,
heavy aluminum filters
that block the collimator
light field. In addition,
CLEAR-Pb® Filters
are only one-fifth as
heavy as aluminum filters.
And, they eliminate the
use of gradient-speed
intensifying screens.
CLEAR-Pb®
Filters are made of lightweight
plastic that is 30% lead
by weight. A unique "Quick-Stik"
magnetic mounting system
plus a filter holder that
slides into the collimator
tray ensure that the filter
is held firmly in place.
It also permits instant
repositioning as the area
and/or degree of filter
coverage changes.
Improve
image quality, even in
areas of varying body
thickness.
Many routine radiography
exams including mediastinum
and chest tomography,
aortic arch angiography,
dorso-plantar foot views
and full-spine scoliosis
studies, present the problem
of maintaining an optimal
range of film densities
because of the great differences
in body thickness. In
order to achieve diagnostic
quality, conventional
methods subject the thinner
body areas to unnecessary
radiation exposure. By
compensating for the differences
in body thickness, CLEAR-Pb®
Filters reduce over-exposure
of both the film and the
patient. The filters help
ensure optimum image quality
and provide improved diagnostic
detail. Because the use
of CLEAR-Pb® Filters
result in a reduction
of radiation exposure
where it is not needed,
in some studies patient
doses can be reduced by
a factor of 100.
Clinical
tests confirm advantages
of CLEAR-Pb® Lead-Plastic
Compensation Filters.
In tests conducted by
the Center for Devices
and Radiological Health
(CDRH), Nuclear Associates’
Lead-Plastic Transparent
Compensation Filters and
Breast Shields were used
with children undergoing
scoliosis radiography.
The tests had a two-fold
purpose: to reduce radiation
doses to the children
and to provide more uniform
film densities throughout
the entire spine. The
sCDRH reports exposure
reductions of about 80%
to the skin of the breast
when using this filter
for AP projections and
a greatly improved image
quality of the upper spine.1,
2
References:1.
Gray J.E., Hoffman, A.D.,
Peterson H.A., Mayo Clinic:
"Dose Reduction in
Radiography for Scoliosis".
J. Bone Joint Surg., (Jan.,
1983), 5-12.
2. "Patient Exposure
Reduction During Scoliosis
Radiography," |
