Blip design for random sampling compressed sensing of flyback 3D-MRSI
View Patent ↗A method of providing a magnetic resonance spectral image (MRSI) is provided. A magnetic resonance imaging excitation is applied. Data is acquired, comprising applying an oscillating gradient in a first dimension and applying blips in at least a second dimension in a pseudo-random order to acquire pseudo-random temporally undersampled spectral data in at least two planes. The pseudo-random order is used to reconstruct a magnetic resonance spectral image in at least two dimensions.
1. A method of providing a magnetic resonance spectral image (MRSI), comprising:
a) applying a magnetic resonance imaging excitation;
b) acquiring data, comprising:
applying an oscillating gradient in a first dimension, and
applying blips in at least a second dimension in a pseudo-random order to acquire pseudo-random temporally undersampled spectral data in at least two planes; and
c) using the pseudo-random order to reconstruct a magnetic resonance spectral image in at least two dimensions.
2. The method, as recited in claim 1 , wherein the magnetic resonance spectral image is in three dimensions.
3. The method, as recited in claim 2 , wherein the acquiring data uses flyback readouts.
4. The method, as recited in claim 3 , wherein the applying pseudo-random blips applies blips in a third dimension to acquire temporally undersampled spectral data in at least four planes.
5. The method, as recited in claim 4 , wherein the magnetic resonance spectral image in at least two dimensions is a hyperpolarized image.
6. The method of claim 5 , wherein the magnetic resonance spectral image in at least two dimensions is a 13 C 3D hyperpolarized image.
7. The method, as recited in claim 6 , wherein sampling time is reduced by a factor of at least 2.
8. The method, as recited in claim 7 , wherein the acquiring data uses a spin-echo sequence.
9. The method of claim 1 where the reconstruction uses the equation Minimize ∥W g∥ 1 s.t. ∥F k g−y∥ 2 <ε.
10. The method, as recited in claim 1 , wherein the acquiring data uses flyback readouts.
11. The method, as recited in claim 1 , wherein the applying pseudo-random blips applies blips in a third dimension to acquire temporally undersampled spectral data in at least four planes.
12. The method, as recited in claim 1 , wherein the magnetic resonance spectral image in at least two dimensions is a hyperpolarized image.
13. The method of claim 1 , wherein the magnetic resonance spectral image in at least two dimensions is a 13 C 3D hyperpolarized image.
14. The method, as recited in claim 1 , wherein sampling time is reduced by a factor of at least 2.
15. The method, as recited in claim 1 , wherein the acquiring data uses a spin-echo sequence.
16. The method, as recited in claim 1 , further comprising displaying the reconstructed image.
17. An apparatus for providing a magnetic resonance spectral imaging (MRSI), comprising:
a magnetic resonance imaging excitation and detection system; and
a controller electrically connected to the magnetic resonance imaging excitation and detection system, comprising:
a display;
at least one processor; and
computer readable media, comprising:
computer readable code for applying a magnetic resonance imaging excitation;
computer readable code for acquiring data, comprising:
computer readable code for applying an oscillating gradient in a first dimension, and
computer readable code for applying blips in at least a second dimension in a pseudo-random order to acquire pseudo-random temporally undersampled spectral data in at least two planes;
computer readable code for using the pseudo-random order to reconstruct a magnetic resonance spectral image in at least two dimensions; and
computer readable code for displaying the image on the display.