Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories
First Claim
Patent Images
1. A method of magnetic resonance imaging of hemodynamic or blood flow parameters comprising the steps of:
- a) applying pulse echo RF excitation pulses to excite nuclear spins,b) applying a multiple gradient or spin echo pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence and a later echo is acquired near the end of the gradient pulse sequence, andc) using echo signals to derive spatial and temporal maps of quantitative functional, hemodynamic, or blood flow parameters, wherein the gradient pulse sequence provides k-space trajectories that oversample the origin of k-space and provide spatial and temporal RF coil sensitivities information for use in parallel image reconstruction and wherein the early echo avoids saturation effects and provides a spatial or temporal information of an arterial input function, and the later echo provides information with more sensitivity to a contrast agent for a susceptibility weighted image.
2 Assignments
0 Petitions
Accused Products
Abstract
Measurements of functional, hemographic, and blood flow parameters use a multiple echo or spin echo gradient pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence which avoids saturation effects and a later echo near the end of the pulse sequence which can provide information with more sensitivity to a contrast agent for a susceptibility weighted image.
-
Citations
18 Claims
-
1. A method of magnetic resonance imaging of hemodynamic or blood flow parameters comprising the steps of:
-
a) applying pulse echo RF excitation pulses to excite nuclear spins, b) applying a multiple gradient or spin echo pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence and a later echo is acquired near the end of the gradient pulse sequence, and c) using echo signals to derive spatial and temporal maps of quantitative functional, hemodynamic, or blood flow parameters, wherein the gradient pulse sequence provides k-space trajectories that oversample the origin of k-space and provide spatial and temporal RF coil sensitivities information for use in parallel image reconstruction and wherein the early echo avoids saturation effects and provides a spatial or temporal information of an arterial input function, and the later echo provides information with more sensitivity to a contrast agent for a susceptibility weighted image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification