MRI estimation of turbulent abnormalities in blood flow by improved multiparametric encoding gradients

D. Kwiat*, S. Einav, D. Elad

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A novel magnetic resonance approach to imaging turbulence in the velocity profiles in major blood vessels is presented. An nuclear magnetic resonance (NMR) image, in general, is dependent on parameters like r, v, a, which represent deterministic parameters of motion. In addition, spins undergo random motion such as diffusion and turbulence, which cannot be described by a predetermined set of parameters of motion. The differentiation between turbulent and nonturbulent flow is based on the deterministic or indeterministic nature of the flow as a function of time. A method of building up a general gradient from a basic set of gradients is investigated here. Image blurring due to the nondeterministic behavior of spins (e.g., diffusion and turbulence) is not removed by this technique of a composite gradient encoding field. This fact is the key to the possibility of identifying regions of turbulent flow. Because of its random nature, elimination of turbulent effects by use of a deterministic method is bound to fail. On the other hand, regions of turbulent flow may be identified owing to signal decrease from those regions.

Original languageEnglish
Title of host publicationComputers in Cardiology
PublisherPubl by IEEE
Number of pages3
ISBN (Print)0818621141
StatePublished - Sep 1989
EventProceedings - Computers in Cardiology - Jerusalem, Isr
Duration: 19 Sep 198922 Sep 1989

Publication series

NameComputers in Cardiology
ISSN (Print)0276-6574


ConferenceProceedings - Computers in Cardiology
CityJerusalem, Isr


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