Fluke Biomedical 57-411 - Manual (Page 5)

General Information
Introduction
1
1-1
Section 1
General Information
1.1 Introduction
CLEAR-Pb Compensation Filters are made of a lead- plastic material that is 30% lead by weight. Since
lead is an efficient absorber of x-rays, the filters will attenuate the x-ray beam. By varying the shape and
thickness of the filters, many combinations of filtering action can be achieved...from almost complete
attenuation to full penetration. (See Figure 1-1.)
Figure 1-1 Filters attenuate x-ray beam to provide even exposure throughout image area.
CLEAR-Pb Filters improve image quality significantly and decrease patient radiation doses during
radiography. They compensate for differences in body thickness or density in full-spine exams, combined
mediastinum and lung-chest tomography, aortic arch angiography, full-length leg radiographs, among
others.
CLEAR-Pb Filters are transparent and lightweight. By means of our “Quick-Stik” system of magnetic
strips, the filters can be held firmly in place or repositioned instantly. You can see and adjust the area
and/or degree of filter coverage as necessary. Last-minute positioning checks of the patient, x-ray
collimator and filters are possible, thanks to the filter transparency. Selected-beam shaping has never
been so simple and effective.
CLEAR-Pb Filters should be used with a rare-earth film/screen combination to improve the image quality.
Consult your film manufacturer for the proper combination.