Undersampled projection‐reconstruction imaging for time‐resolved contrast‐enhanced imaging

In time‐resolved contrast‐enhanced 3D MR angiography, spatial resolution is traded for high temporal resolution. A hybrid method is presented that attempts to reduce this tradeoff in two of the spatial dimensions. It combines an undersampled projection acquisition in two dimensions with variable rate k‐space sampling in the third. Spatial resolution in the projection plane is determined by readout resolution and is limited primarily by signal‐to‐noise ratio. Oversampling the center of k‐space combined with temporal k‐space interpolation provides time frames with minimal venous contamination. Results demonstrating improved resolution in phantoms and volunteers are presented using angular undersampling factors up to eight with acceptable projection reconstruction artifacts. Magn Reson Med 43:170–176, 2000. © 2000 Wiley‐Liss, Inc.

[1]  K Scheffler.  Tomographic imaging with nonuniform angular sampling. , 1999, Journal of computer assisted tomography.

[2]  T. Chenevert,et al.  Automated detection of bolus arrival and initiation of data acquisition in fast, three-dimensional, gadolinium-enhanced MR angiography. , 1997, Radiology.

[3]  G C McKinnon,et al.  Optimization of contrast timing for breath‐hold three‐dimensional MR angiography , 1997, Journal of magnetic resonance imaging : JMRI.

[4]  Peter M. Joseph,et al.  Experimental simulation evaluation of ECG-gated heart scans with a small number of views. , 1983 .

[5]  S J Riederer,et al.  Fluoroscopically triggered contrast-enhanced three-dimensional MR angiography with elliptical centric view order: application to the renal arteries. , 1997, Radiology.

[6]  R Frayne,et al.  Time‐resolved contrast‐enhanced 3D MR angiography , 1996, Magnetic resonance in medicine.

[7]  Projection Reconstruction reduced FOV Imaging , 2022 .

[8]  N M Rofsky,et al.  Breath-hold single-dose gadolinium-enhanced three-dimensional MR aortography: usefulness of a timing examination and MR power injector. , 1996, Radiology.

[9]  M. Prince,et al.  MR Angiography of the Renal Arteries , 1993 .

[10]  J Hennig,et al.  Reduced circular field‐of‐view imaging , 1998, Magnetic resonance in medicine.

[11]  Richard Frayne,et al.  3D Time‐resolved contrast‐enhanced MR DSA: Advantages and tradeoffs , 1998, Magnetic resonance in medicine.

[12]  Volker Rasche,et al.  Projection–reconstruction reduces FOV imaging , 1999 .

[13]  A. Macovski,et al.  Selection of a convolution function for Fourier inversion using gridding [computerised tomography application]. , 1991, IEEE transactions on medical imaging.

[14]  M. Bock,et al.  Renal arteries: optimization of three-dimensional gadolinium-enhanced MR angiography with bolus-timing-independent fast multiphase acquisition in a single breath hold. , 1999, Radiology.

[15]  J. Whitley,et al.  EXPERIMENTAL SIMULATION EVALUATION OF ECGGATED HEART SCANS WITH A SMALL NUMBER OF VIEWS , 1983 .

[16]  D. Noll,et al.  Homodyne detection in magnetic resonance imaging. , 1991, IEEE transactions on medical imaging.

[17]  D. Peters,et al.  Undersampled projection reconstruction applied to MR angiography , 2000, Magnetic resonance in medicine.