APPLICATION OF REDUCED-ENCODING IMAGING WITH GENERALIZED-SERIES RECONSTRUCTION (RIGR) IN DYNAMIC MR-IMAGING

Dynamic MRI has proven to be an important tool in studies of transient physiologic changes in animals and humans, High sensitivity and tempo ral resolution in such measurements are critical for accurate estimati on of dynamic information, Fast imaging, often involving expensive har dware, has evolved for use in such cases. We demonstrate herein the po ssibility of accelerated data acquisition schemes on conventional mach ines using standard pulse sequences for dynamic studies. This is achie ved by combining reduced-encoded dynamic data (typically 30 to 40 phas e encodings) with a priori high-resolution data via a novel constraine d image reconstruction algorithm, Such an approach reduces image acqui sition time significantly (by a factor of 3 to 4 in the examples descr ibed here) without loss in the accuracy of information.