Tracking brain motion during the cardiac cycle using spiral cine-DENSE MRI.
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| Title: | Tracking brain motion during the cardiac cycle using spiral cine-DENSE MRI. |
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| Authors: | Xiaodong Zhong1, Meyer, Craig H.1, Schlesinger, David J.2, Sheehan, Jason P.2, Epstein, Frederick H.3, Larner, James M.4, Benedict, Stanley H.4, Read, Paul W.4, Ke Sheng4, Jing Cai4 jc4we@virginia.edu |
| Source: | Medical Physics. Aug2009, Vol. 36 Issue 8, p3413-3419. 7p. 2 Color Photographs, 2 Black and White Photographs, 1 Diagram, 1 Chart, 1 Graph. |
| Subjects: | Brain, Diagnostic imaging, Heart beat, Optical resolution, Medical physics |
| Abstract: | Cardiac-synchronized brain motion is well documented, but the accurate measurement of such motion on the pixel-by-pixel basis has been hampered by the lack of proper imaging technique. In this article, the authors present the implementation of an autotracking spiral cine displacement-encoded stimulation echo (DENSE) magnetic resonance imaging (MRI) technique for the measurement of pulsatile brain motion during the cardiac cycle. Displacement-encoded dynamic MR images of three healthy volunteers were acquired throughout the cardiac cycle using the spiral cine-DENSE pulse sequence gated to the R wave of an electrocardiogram. Pixelwise Lagrangian displacement maps were computed, and 2D displacement as a function of time was determined for selected regions of interests. Different intracranial structures exhibited characteristic motion amplitude, direction, and pattern throughout the cardiac cycle. Time-resolved displacement curves revealed the pathway of pulsatile motion from brain stem to peripheral brain lobes. These preliminary results demonstrated that the spiral cine-DENSE MRI technique can be used to measure cardiac-synchronized pulsatile brain motion on the pixel-by-pixel basis with high temporal/spatial resolution and sensitivity. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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