What is the effect of increasing filtration on penetration and dose savings?

Increasing filtration in a fluoroscopy system has a significant impact on both penetration and dose savings. When filtration is increased, the lower-energy photons that contribute less to image formation and increase patient dose are absorbed, while the higher-energy photons that contribute to penetration are allowed to pass through. This leads to more penetration of the x-ray beam, as the remaining photons have higher energy.

Moreover, by removing the less penetrating low-energy photons, there is a reduction in the overall dose delivered to the patient (dose savings). While there may be a perception that techniques might become longer due to adjustments needed in exposure time or source-to-image distance for optimal imaging, the primary benefits lie in enhanced image quality through improved contrast and reduced patient exposure.

This balance between effective penetration and dose management highlights the value of filtration in fluoroscopic procedures, making choice C the most appropriate option. Filtration optimizes image quality while minimizing unnecessary radiation exposure to patients.