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1995 SMR young investigators' award finalist: MR measurement of time‐dependent blood pressure variations
Author(s) -
Urchuk Stephen N.,
Plewes Donald B.
Publication year - 1995
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880050602
Subject(s) - pulsatile flow , distension , biomedical engineering , imaging phantom , materials science , compliance (psychology) , blood flow , root mean square , pressure measurement , nuclear medicine , medicine , nuclear magnetic resonance , physics , radiology , cardiology , psychology , social psychology , quantum mechanics , meteorology
An MR imaging method for measuring intravascular pressure variations is introduced. The technique is based on estimates of vascular compliance and vessel distension, which are obtained from a correlation of spatial and temporal velocity derivatives and measurements of the velocity gradient in the direction of flow, respectively. The accuracy of the technique was determined in vitro through a comparison of MR and transducer pressure measurements obtained in distensible vessel phantoms undergoing pulsatile flow. Results indicated that a root‐mean‐square error of 4–12% can be expected in phantoms covering a physiological range of compliance. In vivo feasibility was demonstrated by thoracic aorta pressure measurements, which produced pressure waveforms with an expected shape and magnitude.