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30 April 2004 Flow and distension in the carotid artery from magnetic resonance imaging
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Hemodynamic conditions in the carotid artery may be associated with progression of carotid artery (CA) disease and with the risk of stroke. A methodology for objective measurement of distension (DCA) and blood-flow (QCA) waveform from phase-contrast (PC) magnetic resonance (MR) imaging is presented. Measurement of DCA is obtained using a modified Hough Transform (mHT) applied to the magnitude-component of the PC MR. The mHT is based on the optimization of an objective function which is the sum of the gradient magnitude of the image sampled at 10° increments around the circle using bilinear interpolation. The mHT detects the boundary of the vessel in the cross-sectional image at 0.05-pixel resolution. Measurement of QCA is obtained by integration of the image intensity in the phase-component of the PC MR within the circular region detected by the mHT.
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Peter J. Yim and J. Kevin Demarco "Flow and distension in the carotid artery from magnetic resonance imaging", Proc. SPIE 5369, Medical Imaging 2004: Physiology, Function, and Structure from Medical Images, (30 April 2004);

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