Recursive filtration

Last revised by Jeremy Jones on 20 Sep 2021

Recursive filtration or averaging is a technique used to reduce excessive noise in fluoroscopy, where parts of the current frame and several preceding frames are combined to create an 'averaged' image. This helps to increase the signal to noise ratio in the final image without contributing to patient dose.

The disadvantage of utilizing such a technique is that it can reduce temporal resolution and create a lag, particularly if there is excessive movement between frames.

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