Image signal representing a scene

Patent metadata

Field	Value
Publication number	US-12078702-B2
Application number	US-202017428298-A
Country	US
Kind code	B2
Filing date	Feb 5, 2020
Priority date	Feb 6, 2019
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

To reduce instances of patient call back examinations and longer acquisition times in MRI, caused by features noticed at the periphery of a prescribed field of view (FOV) image, an extended field of view (EFOV) image is generated by storing k-space data including oversampling data, in a Picture Archiving and Communication System (PACS) and/or technician workstation. The saved k-space data is repurposed to re-reconstruct the (EFOV) image before any cropping operation on the prescribed FOV. In another application, the extended (EFOV) image is generated by repurposing stored k-space oversampling data, from adjacent or overlapping fields of view (FOV). The disclosed device and method can be used advantageously in a multi-station MRI IT system and/or spinal MRI examinations.

First claim

The invention claimed is:

1. A method of reconstructing an image of a subject in a MRI IT system comprising: acquiring k-space data including oversampling k-space data for a prescribed field of view (FOV) image of the subject; and storing the acquired data and the specific angulation data used for the acquisition in a non-transitory storage medium; and processing the stored data to reconstruct a first extended field view (EFOV) image; cropping the first EFOV image to generate the prescribed FOV image without aliasing or wrap artifacts; and displaying the prescribed (FOV) image; and reusing the stored data to re-reconstruct a second extended (EFOV) image; and displaying the second extended field of view (EFOV) image.

2. The method of reconstructing an image of a subject in a MRI IT system of claim 1 wherein: the non-transitory storage medium is a PACS (Picture Archiving and Communications System) and/or a technician workstation.

3. The method of reconstructing an image of a subject in a MRI IT system of claim 2 wherein: the PACS and/or technician workstation further stores executable instructions for the re-reconstruction of the second extended (EFOV) image.

4. The method of reconstructing an image of a subject in a MRI IT system of claim 1 wherein: the display of the of the prescribed (FOV) image contains an indication that the second (EFOV) image is available.

5. The method of reconstructing an image of a subject in a MRI IT system of claim 1 wherein: the display of the of the prescribed (FOV) image contains in indication that the second (EFOV) image may contain aliasing and wrap artifacts.

6. The method of reconstructing an image of a subject in a MRI IT system of claim 1 wherein: the re-reconstruction of the second extended (EFOV) image is performed in the phase encode (PE) direction.

7. The method of reconstructing an image of a subject in a MRI IT system of claim 1 wherein: the re-reconstruction of the second extended (EFOV) image is performed in the slice select (SS) direction.

8. A device for reconstructing an image of a subject in a MRI IT system by repurposing image data comprising: a non-transitory storage medium for storing acquired k-space data including oversampling k-space data for a plurality of prescribed field of view (FOV) images that are adjacent or overlapping of the subject and have the same angulation; and a processor for processing the stored data to reconstruct at least one of the prescribed field of view (FOV) images and an extended field of view (EFOV) image of the prescribed FOV image without any aliasing or wrap artifacts by repurposing k-space oversampling data from said adjacent or overlapping prescribed (FOV) images; and a display for displaying the prescribed (FOV) image and the extended field of view (EFOV) image.

9. The device for reconstructing an image of claim 8 wherein: the non-transitory storage medium is in a PACS and/or a technician workstation.

10. The device for reconstructing an image of claim 9 wherein: the PACS and/or a technician workstation further stores executable instructions to perform the reconstruction of the extended (EFOV) image.

11. The device for reconstructing an image of claim 8 wherein: the display of the prescribed (FOV) image contains an indication that the extended field of view (EFOV) image is available.

12. The device for reconstructing an image of claim 8 wherein: a user interface is provided to control the processor to reconstruct the extended field view (FOV) image.

13. The device for reconstructing an image of claim 8 wherein: the plurality of prescribed field of view (FOV) images correspond to adjacent body parts of the subject.

14. The device for reconstructing an image of claim 12 wherein: the plurality of prescribed field of view (FOV) images correspond to successive adjacent stations of a multi-station examination of the subject.

15. The device for reconstructing an image of claim 12 wherein: the adjacent body parts correspond to the spine of the subject.

16. The device for reconstructing an image of claim 12 wherein: the prescribed field of view (FOV) images include; thoracic, cervical and lumbar images of the subject.

17. A method of repurposing image data in a MRI IT examination of a subject comprising: acquiring k-space data including oversampling k-space data for a plurality of prescribed field of view (FOV) images of the subject that are adjacent or overlapping and have the same angulation; and storing the acquired data in a non-transitory storage medium; and
processing the stored data to reconstruct at least one of the prescribed field of view (FOV) images and an extended field of view (EFOV) image of the prescribed FOV image without any aliasing or wrap artifacts by repurposing k-space oversampling data from said adjacent or overlapping prescribed (FOV) images; displaying the prescribed (FOV) image and the extended field of view (EFOV) image.

18. The method of repurposing image data of claim 17 wherein; the non-transitory storage medium is a PACS (Picture Archiving and Communications System) and/or a technician workstation.

19. he method of repurposing image data of claim 18 wherein; the PACS (Picture Archiving and Communications System) and/or the technician workstation, further stores tagged metadata.

20. The method of repurposing image data of claim 19 wherein; the metadata is stored as data acquisition parameters for the MRI IT examination of the subject.

21. The method of repurposing image data of claim 19 wherein; the oversampling data is phase or frequency oversampling data.

Assignees

• Koninklijke Philips Nv

Inventors

• Johnson Brian David
• Dimitrov Ivan
• Ganji Sandeep K

Classifications

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• G01R33/56545

  caused by finite or discrete sampling, e.g. Gibbs ringing, truncation artefacts, phase aliasing artefacts · CPC title

• G01R33/5619

  by temporal sharing of data, e.g. keyhole, block regional interpolation scheme for k-Space [BRISK] · CPC title

• G01R33/5608 Primary

  Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels (image data processing or generation, in general G06T) · CPC title

• G01R33/4835

  of multiple slices · CPC title