Accuracy of blood transit time estimates using temporal filtering in digital radiology | Zendy

Wyman D. R. | Zendy; Wilson B. C. | Zendy

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Accuracy of blood transit time estimates using temporal filtering in digital radiology

Author(s) -

Wyman D. R.,

Wilson B. C.

Publication year - 1986

Publication title -

medical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.473

H-Index - 180

eISSN - 2473-4209

pISSN - 0094-2405

DOI - 10.1118/1.595928

Subject(s) - noise reduction , filter (signal processing) , transit time , noise (video) , blood flow , contrast (vision) , reduction (mathematics) , digital filter , computer science , mean transit time , dispersion (optics) , algorithm , mathematics , computer vision , medicine , image (mathematics) , optics , physics , radiology , engineering , geometry , perfusion scanning , perfusion , transport engineering

The application of recursive filtering in digital radiology can yield incorrect blood flow estimates if blood flow is calculated using a transit time, defined as the difference in times to peak contrast over the length of a vessel segment. The transit time error is calculated here, from computer simulations, as a function of filter design, image noise and contrast medium dispersion over the vessel segment. An error reduction procedure based on prefiltering is suggested and tested by simulation. Results indicate that the transit time error can be substantial and the reduction procedure effective, depending on the filter design and system noise level.

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