Filtration in Radiography

These flashcards cover key concepts about filtration in radiography, including definitions, processes, and specific types of filters.

Filtration

The process of eliminating undesirable low-energy x-ray photons by inserting absorbing materials into the primary beam.

Hardening the Beam

A term used for the process of filtration as it removes low-energy (soft) photons from the x-ray beam.

Half-Value Layer (HVL)

The amount of absorbing material required to reduce the intensity of the primary beam to one-half its original value.

Inherent Filtration

Filtration that is a part of the x-ray tube and housing due to their composition.

Added Filtration

Filtration that occurs outside the x-ray tube and housing before the image receptor.

Compensating Filter

A filter designed to equalize exposure by compensating for unequal subject densities.

Compound Filter

A filter made from two or more materials that work together to absorb a range of photon energies.

Aluminum Equivalency (Al/Eq)

A way of expressing the thickness of filtration by comparing it to equivalent thicknesses of aluminum.

Entrance Skin Exposure (ESE)

The radiation dose received by the skin at the point of entrance of the x-ray beam.

Collimator

A device that helps shape the primary x-ray beam and adds filtration to the x-ray emission.