- Patent Title: MR imaging using motion-dependent radial or spiral k-space sampling
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Application No.: US16754771Application Date: 2018-10-05
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Publication No.: US11269037B2Publication Date: 2022-03-08
- Inventor: Mariya Ivanova Doneva , Jan Hendrik Wulbern , Gabriele Marianne Beck
- Applicant: KONINKLIJKE PHILIPS N.V.
- Applicant Address: NL Eindhoven
- Assignee: KONINKLIJKE PHILIPS N.V.
- Current Assignee: KONINKLIJKE PHILIPS N.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP17195606 20171010
- International Application: PCT/EP2018/077181 WO 20181005
- International Announcement: WO2019/072719 WO 20190418
- Main IPC: G01R33/567
- IPC: G01R33/567 ; G01R33/48 ; G01R33/561

Abstract:
The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). It is an object of the invention to enable MR imaging using a radial (or spiral) acquisition scheme with a reduced level of motion artefacts. The method of the invention comprises the following sequence of steps: —detecting a momentary motion—induced displacement (Δ) of the object (10); —attributing the detected displacement (A) to a motion state (M1-M5), each motion state (M1-M5) corresponding to one of a plurality of contiguous ranges of displacements (Δ); —determining angular coordinates of a radial or spiral k-space profile by incrementing the angular coordinates individually for each motion state (M1-M5) starting from initial angular coordinates; —acquiring the k-space profile; —repeating steps a-d a number of times; and —reconstructing an MR image from at least the k-space profiles attributed to one of the motion states (M1-M5). Moreover, the invention relates to a MR device (1) for carrying out this method as well as to a computer program to be run on a MR device (1).
Public/Granted literature
- US20200300952A1 MR IMAGING USING MOTION-DEPENDENT RADIAL OR SPIRAL K-SPACE SAMPLING Public/Granted day:2020-09-24
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