Parallel Transmission

并行发射的新进展

高性能硬件和令人振奋的应用前景为并行发射技术在临床前 MRI 领域的应用铺平了道路

3D 内部体积成像

3D Inner Volume Imaging
In a pilot scan (a) the brain is selected as a target for inner volume imaging. This volume is then selectively excited using 3D parallel spatially selective excitation (b). The high accuracy of the selection allows the reduction of the FOV to the excited

抑制颈动脉波动伪影

Suppression of Artifacts from Pulsatile Flow in the Carotids
(a): Motion or pulsatile flow can cause artifacts along the phase encoding direction.

(b): Parallel spatially selective excitation of the brain region only leads to an artifact-free brain image, since the artefact causing structures are not excited (“

任意形状体积的波谱

Spectroscopy in Arbitrarily Shaped Target Volumes
Localized spectroscopy in the rat head: Comparison of proton NMR spectra from a standard rectangular voxel and an adapted “whole brain” voxel (see ROIs in (a)). It is shown that such adapted voxels can be selected with very good accuracy using parallel sp

用于 TOF 血管造影的灵活的自旋标记

Flexible Spin-Labeling for TOF Angiography
TOF angiography in the rat head: (a) conventional TOF acquisition; (b): TOF with 3D parallel spatially selective saturation (labeling) of spins in one carotid results in suppression of signal from this vessel; (c): difference image yields the labeled caro