Aorta wall motion monitoring by 1-d MRI of perpendicular diameters.
A method for monitoring the cross-sectional size of blood vessels rapidly is introduced. The method creates a one-dimensional (1-D) profile of a strip along the diameter of a vessel using magnetic resonance imaging (MRI). The strips can be much wider than pixels in a typical two-dimensional (2-D) image to increase the signal-to-noise ratio. A second strip perpendicular to the first is also imaged sequentially to allow the detection, estimation, and correction of errors in diameter measurements resulting from the strip inadvertently covering a chord, rather than a diameter. Diameter measurements derived from 1-D profiles agree with measurements derived from 2-D images. This method is nearly an order of magnitude faster than 2-D MRI and has the potential for real-time implementation. J. Magn. Reson. Imaging 1999;10:833-840.
Chia
Y H
YH
Department of Medical Biophysics, University of Toronto Imaging/Bioengineering Research, Sunnybrook and Women's College Health Sciences Center, Toronto, Ontario, Canada. ychia@sten.sunnybrook.utoronto.ca
Wood
M L
ML
Leung
W M
WM
Plewes
D B
DB
D001011:Aorta / Q000033:anatomy & histology* / Q000502:physiology; D004548:Elasticity; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods; D019047:Phantoms, Imaging