| US 7,610,076 B2 | ||
| Method for acquiring time-resolved MR images using continuous table motion | ||
| Stephen J. Riederer, Rochester, Minn. (US); David G. Kruger, Nelson, Wis. (US); and Ananth J. Madhuranthakam, Rochester, Minn. (US) | ||
| Assigned to Mayo Foundation for Medical Education and Research, Rochester, Minn. (US) | ||
| Filed on Mar. 05, 2004, as Appl. No. 10/795,044. | ||
| Claims priority of provisional application 60/452757, filed on Mar. 07, 2003. | ||
| Prior Publication US 2004/0210129 A1, Oct. 21, 2004 | ||
| Int. Cl. A61B 5/055 (2006.01) | ||
| U.S. Cl. 600—415 [600/420] | 21 Claims |
| 15. In a magnetic resonance imaging (MRI) system having a defined field of view (FOV), a method for producing an image of
a subject over an extended field of view (FOVtot) which is larger than the FOV, the steps comprising:
a) injecting a contrast agent into the subject;
b) moving the subject through the MRI system such that the extended field of view (FOVtot) passes through the defined field of view (FOV);
c) acquiring three-dimensional image data while step b) is performed by repeatedly performing a three-dimensional pulse sequence
with the MRI system to repeatedly sample three-dimensional k-space in accordance with a prescribed sampling pattern, in which
the prescribed sampling pattern fully samples a central region of k-space and undersamples a peripheral region of k-space;
d) adjusting the three-dimensional image data acquired in step c) to offset table motion during its acquisition;
e) reconstructing a series of time resolved, three-dimensional images from the adjusted three-dimensional image data acquired
at successive times;
f) examining the magnitude of pixels in the reconstructed series of time resolved, three-dimensional images to determine when
contrast agent arrived therein; and
g) reconstructing an image from adjusted three-dimensional image data that depicts the contrast enhanced vasculature of the
subject throughout the extended field of view (FOVtot).
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