Ferlic Filter Co., LLC  
P.O. Box 10629  
St. Paul, MN 55110  





 



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Compensating Filters

Compensating filters were introduced shortly after the discovery of x-ray. The image quality is improved with filters because of the limitation of both film & CR to record a broad range of densities on a body part with large variations, for example: the C7/T1-T2 area. CR is more effective than film however it is limited when the ratio of thickness of the body part being recorded is more than 3 to 1 relative to the kVp. Examples are the swimmers views taken on patients with broad shoulders or the axial view of the heel. I was familiar with the problems and challenges having been an R.T. for over 40 years.

The opportunity to resolve and improve filters is based on two ideas: Create a filter that can be used at the tube by sliding it into the collimator rails and having the base of the filter square. The square base allow the technologist to slide the filter in until it stops. It is centered! The effect of having it a the tube head magnifies the edge to eliminate the line on the film which is evident when the a filter is under the anatomy part. The radiation is significantly reduced by having the radiation filtered and reduced before it reaches the patient. Improving images and reducing radiation to the patient is the benefit of using a filter for both film and CR.


Examples of What Our Filters Do

SWIMMERS LATERAL HIP

Click Here to view all of our compensating filters

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