Skip to main content

Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution

Publication ,  Journal Article
Dobbins, JT; Van Lysel, MS; Hasegawa, BH; Peppier, WW; Mistretta, CA
Published in: Proceedings of SPIE - The International Society for Optical Engineering
December 13, 1983

A circuit has been constructed to perform spatial frequency filtration on DSA images at real-time video rates. The 10-bit device performs low-pass or high-pass filtering, and with external memory can perform bandpass and more sophisticated filtering. Pixels in the convolving kernel are weighted independendently in the x-and y-directions to provide a Gauss-ian-like convolving function. The kernel width ranges from 3-30 pixels and appropriate weighting yields a FWHM of the Gaussian kernel function as small as 0.85 pixel width for horizontal image widths of ≤256 pixels and as small as 1.25 pixel width for a horizontal image width of 512 pixels. Applications to be investigated include scatter and glare correction for videodensitometry, enhancement of arteries behind large opacified structures such as the ventricle and aorta, noise suppression in low-spatial frequency DSA exams, edge-enhancement of images, and partial-pixel shifting. Peli and Lim have suggested a more sophisticated algorithm which enhances high-pass filtration only in dark regions of an image. This and other techniques may be implemented with the current circuit to enhance small detail in highly opacified regions such as the ventricle, while leaving the rest of the image unaltered. © 1983 SPIE.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

Publication Date

December 13, 1983

Volume

419

Start / End Page

111 / 121

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Dobbins, J. T., Van Lysel, M. S., Hasegawa, B. H., Peppier, W. W., & Mistretta, C. A. (1983). Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution. Proceedings of SPIE - The International Society for Optical Engineering, 419, 111–121. https://doi.org/10.1117/12.936013
Dobbins, J. T., M. S. Van Lysel, B. H. Hasegawa, W. W. Peppier, and C. A. Mistretta. “Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution.” Proceedings of SPIE - The International Society for Optical Engineering 419 (December 13, 1983): 111–21. https://doi.org/10.1117/12.936013.
Dobbins JT, Van Lysel MS, Hasegawa BH, Peppier WW, Mistretta CA. Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution. Proceedings of SPIE - The International Society for Optical Engineering. 1983 Dec 13;419:111–21.
Dobbins, J. T., et al. “Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 419, Dec. 1983, pp. 111–21. Scopus, doi:10.1117/12.936013.
Dobbins JT, Van Lysel MS, Hasegawa BH, Peppier WW, Mistretta CA. Spatial frequency filtering in digital subtraction angiography (DSA) by real-time digital video convolution. Proceedings of SPIE - The International Society for Optical Engineering. 1983 Dec 13;419:111–121.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

Publication Date

December 13, 1983

Volume

419

Start / End Page

111 / 121

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering