Dies ist eine Übersichtsseite mit Metadaten zu dieser wissenschaftlichen Arbeit. Der vollständige Artikel ist beim Verlag verfügbar.
Undersampled projection reconstruction applied to MR angiography
370
Zitationen
7
Autoren
2000
Jahr
Abstract
Undersampled projection reconstruction (PR) is investigated as an alternative method for MRA (MR angiography). In conventional 3D Fourier transform (FT) MRA, resolution in the phase-encoding direction is proportional to acquisition time. Since the PR resolution in all directions is determined by the readout resolution, independent of the number of projections (Np), high resolution can be generated rapidly. However, artifacts increase for reduced Np. In X-ray CT, undersampling artifacts from bright objects like bone can dominate other tissue. In MRA, where bright, contrast-filled vessels dominate, artifacts are often acceptable and the greater resolution per unit time provided by undersampled PR can be realized. The resolution increase is limited by SNR reduction associated with reduced voxel size. The hybrid 3D sequence acquires fractional echo projections in the k(x)-k(y) plane and phase encodings in k(z). PR resolution and artifact characteristics are demonstrated in a phantom and in contrast-enhanced volunteer studies.
Ähnliche Arbeiten
Advances in functional and structural MR image analysis and implementation as FSL
2004 · 14.038 Zit.
A default mode of brain function
2001 · 12.340 Zit.
FSL
2011 · 11.669 Zit.
Improved Optimization for the Robust and Accurate Linear Registration and Motion Correction of Brain Images
2002 · 10.610 Zit.
Functional connectivity in the motor cortex of resting human brain using echo‐planar mri
1995 · 10.031 Zit.