Ectomographic Filtering Applied To Tomographic Digital Subtraction Angiography

B. C. Yih; D. N.Ghosh Roy; R. A. Kruger; S. P.Del Rio; R. L. Power

doi:10.1117/12.947241

11 June 1985 Ectomographic Filtering Applied To Tomographic Digital Subtraction Angiography

B. C. Yih, D. N.Ghosh Roy, R. A. Kruger, S. P.Del Rio, R. L. Power

Proceedings Volume 0535, Application of Optical Instrumentation in Medicine XIII; (1985) https://doi.org/10.1117/12.947241
Event: 1985 Medical Imaging Conferences, 1985, California, United States

Abstract

A filtered backprojection reconstruction method suggested by Knutsson et al (1,2) has been applied to circular tomographic DSA (digital subtraction angiography). We have applied this reconstruction technique, termed "ectomography," to phantom data as well as preliminary in vivo studies employing a dog model. The properties of this technique are illustrated using limited angle (20 degree) circular tomography. Both eight and 16 projections were studied with and without subtraction. The infocus depth of field is markedly increased with this technique. This increased depth of field appears to be extremely useful for displaying dilute objects, such as opacified vasculature. However, both noise and reconstruction artefact are increased. The present status of this work and the future directions for reducing these artefacts are discussed.

Citation Download Citation

B. C. Yih, D. N.Ghosh Roy, R. A. Kruger, S. P.Del Rio, and R. L. Power "Ectomographic Filtering Applied To Tomographic Digital Subtraction Angiography", Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); https://doi.org/10.1117/12.947241

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