The resolution of medical ultrasound systems can be improved using filtering techniques. The authors present a filter for improving the axial resolution that approximates to an inverse filter, but which is less sensitive to noise than a standard inverse filter. The filter is designed in the frequency domain using a sigmoid-based pseudo-inversion technique. This filter is compared with other filtering techniques including a Wiener filter and a matched filter.
Inspec keywords: Wiener filters; medical image processing; filtering theory; matched filters; biomedical ultrasonics
Other keywords:
Subjects: Filters and other networks; Sonic and ultrasonic radiation (biomedical imaging/measurement); Optical, image and video signal processing; Sonic and ultrasonic applications; Sonic and ultrasonic radiation (medical uses); Filtering methods in signal processing; Data gathering, processing, and recording, data displays including digital techniques
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