Continuously moving table data acquisition method for long FOV contrast-enhanced MRA and whole-body MRI.
A method is presented in which an extended longitudinal field of view (FOV), as required for whole-body MRI or MRA peripheral runoff studies, is acquired in one seamless image. Previous methods typically either acquired 3D data at multiple static "stations" which covered the extended FOV or as a series of 2D axial sections. The method presented here maintains the benefits of 3D acquisition while removing the discrete nature of the multistation method by continuous acquisition of MR data as the patient table moves through the desired FOV. Although the technique acquires data only from a homogeneous central volume of the magnet at any point in time, by spatially registering all data it is possible to extend the FOV well beyond this volume. The method is demonstrated experimentally with phantoms, in vivo angiographic animal studies, and in vivo human studies.
Kruger
David G
DG
Magnetic Resonance Research Laboratory, Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, USA. kruger.david@mayo.edu
Riederer
Stephen J
SJ
Grimm
Roger C
RC
Rossman
Phillip J
PJ
D000818:Animals; D001783:Blood Flow Velocity / Q000502:physiology; D003287:Contrast Media; D005583:Fourier Analysis; D019786:Gadolinium DTPA; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation; D018810:Magnetic Resonance Angiography / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D019047:Phantoms, Imaging; D013552:Swine
D003287:Contrast Media; D019786:Gadolinium DTPA