대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)
- 제3권1호
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- Pages.35-42
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- 1982
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- 1229-0807(pISSN)
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- 2288-9396(eISSN)
잡음을 고려한 회귀방법에 의한 초음파 진단기의 화상개선
A Recursive Restoration Scheme of B-Scan Ultrasonographic Images in Noisy Case
- Kim, Sun-I. (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
- Min, Byoung-G. (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
- Ko, Myoung-S. (Department of Enstrumentation and Control College of Engineering, School National University)
- 발행 : 1982.06.01
초록
The objective of this phantom study is to develop a digital method for improving the lateral resolution of B-scan ultrasonographic images irs medical application of ultrasound. By utilizing a discrete state-space modeling approach and Kalman-Buch method for analysis of the transducer's beam profile and the measurement and sampling noise, a stable recursive restoration of the object image was obtained for improved lateral resolution. The point spread function (PSF) was measured for the reflective signals after scanning the small pins located along the depth of interest. One major advantage of the present recursive scheme over the transform method is in its applicability for the space-variant imaging, such as in the case of the rotational movement of transducer.
키워드