Where Is Compensating Filter?

The filter is placed in front of the collimator (via a special adjustable filter holder, magnets, or even velcro) after collimating appropriately, because in most cases the filter is opaque and obliterates the light beam from the collimator.

What is the function of the compensating filter?

The filters are used to limit the primary beam at an anatomical region during a specific examination that requires fine radiographic detail at both the 'denser' and 'less dense' regions, e.g. a horizontal beam lateral hip requiring detail at both the proximal and distal portion of the image.

What are compensating filters made of?

According to Bushong (2001), compensating filters are commonly constructed of aluminium, but plastic materials are sometimes used. Other authors have reported the use of aluminium (Al) TCF (Butler et al, 1986; Crow et al, 1983; Feczko et al, 1983; Katsuda, Okazaki & Kuroda, 1996; Müller et al, 1996c).