University of Alberta

The United States of America, As Represented by the Secretary, Department of Health and Human Services

Siemens Healthcare Gmbh

Richard Thompson

Reza Nezafat

Elliot R McVeigh

Bruce S Spottiswoode

Kelvin Chow

Pierre Boulanger

Kumaradevan Punithakumar

Jacob Lester Jaremko

Abhilash Hareendranathan

Myles Mabee

A method for performing magnetic resonance imaging with variable flip angle (VFA) readouts includes preparing longitudinal magnetization of a spin system associated with a subject to a target state, yielding a prepared longitudinal magnetization. The prepared longitudinal magnetization is converted to an image using a VFA readout sequence, wherein the VFA readout sequence comprises a plurality of radio-frequency pulses with corresponding flip-angles varying according to a modulation function.

Accuracy and off-resonance performance in quantitative magnetization prepared magnetic resonance imaging

An anatomical structure is segmented from images generated in an anatomical scan. A user input device is configured for manually identifying two or more seed points on a plurality of the images. An image processor is configured to identify an optimal path through seed points on the plurality of images with a graph search. The optimal path between corresponding seed points on different images defines a boundary contour, and the anatomical structure includes two or more boundary contour. The image processor is further configured to interpolate the boundary contours over a three-dimensional volume using cardinal splines.

Surface modeling of a segmented echogenic structure for detection and measurement of anatomical anomalies

Phase contrast magnetic resonance images are produced using interleaved spiral k-space scanning with a bipolar phase contrast gradient. Spiral scanning is configured so that acquisition impulse response defines a central alias free portion in a partial field of view, and signal acquisition is arranged so that moving spins are contained with this central alias free portion. First and second signals are acquired with alternate phase encodings, and a complex difference of the acquired signals is obtained. The complex difference is substantially free of aliasing artifacts within the central portion.

Imaging and reconstruction of partial field of view in phase contrast MRI

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Edmonton, Canada

Richard Thompson