Invention Grant
- Patent Title: Multi-echo MR imaging with spiral acquisition
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Application No.: US17613302Application Date: 2020-05-25
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Publication No.: US11639980B2Publication Date: 2023-05-02
- Inventor: Miha Fuderer , Elwin De Weerdt
- 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: EP19176859 20190528
- International Application: PCT/EP2020/064415 WO 20200525
- International Announcement: WO2020/239677 WO 20201203
- Main IPC: G01R33/56
- IPC: G01R33/56 ; G01R33/48

Abstract:
The invention relates to a method of MR imaging of an object (10) positioned in an examination volume of a MR device (1). It is an object of the invention to enable fast spiral MR imaging with a defined T2 contrast. The method of the invention comprises the following steps: —generating a number of spin echoes by subjecting the object (10) to one or 5 more shots of an imaging sequence, each shot comprising an RF excitation pulse (21) followed by a number of RF refocusing pulses (22), wherein modulated readout magnetic field gradients (23, 24) are applied in each interval between successive RF refocusing pulses (22), —acquiring MR signal data, wherein each spin echo is recorded along a spiral trajectory (31-33, 41-43) in k-space which winds around the k-space origin with varying radial distance, wherein the trajectory (31, 41) of at least one spin echo has a different rate of variation of the radial distance at least in a central k-space region compared to the trajectories (32, 33, 42, 43) of the other spin echoes, and—reconstructing an MR image from the acquired MR signal data. Moreover, the invention relates to an MR device (1) and to a computer program for an MR device (1).
Public/Granted literature
- US20220229139A1 MULTI-ECHO MR IMAGING WITH SPIRAL ACQUISITION Public/Granted day:2022-07-21
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