wedge filter


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wedge filter

[′wej ‚fil·tər]
(nucleonics)
A radiation filter so constructed that its thickness or transmission characteristics vary continuously or in steps from one edge to the other; used to increase the uniformity of radiation in certain types of treatment.
References in periodicals archive ?
If you notice that the cervical spine image is too dark (especially on the lateral radiograph), a magnetic cervical spine wedge filter or cervical collar should be used (see Figure 4).
Wedge filters allow the system user to optimize the use of dose by impacting the field of view depending on the patient size and the body part being imaged.