公开(公告)号：US20190004135A1

公开(公告)日：2019-01-03

申请号：US16020656

申请日：2018-06-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jia Guo ,  Yongchuan Lai ,  Tongzhou Wang ,  Hongbin Wang

IPC: G01R33/54 ,  G01R33/48 ,  G01R33/00

Abstract: Methods and apparatuses for processing MR signal are disclosed herein. An exemplary method comprises: when acquired K-space signals are amplified, assigning a first amplification gain to signals within a first signal region in the K space, and assigning a second amplification gain to signals within a second signal region in the K space.

公开(公告)号：US20190302212A1

公开(公告)日：2019-10-03

申请号：US16361913

申请日：2019-03-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Lisha Nie ,  Yongchuan Lai ,  Tongzhou Wang ,  Tengfei Wang

IPC: G01R33/58 ,  G01R33/385 ,  G01R33/56 ,  G01R33/54 ,  G01R33/48

Abstract: Methods and apparatuses for calibrating a center frequency of MR and an MRI system are disclosed herein. An exemplary method comprises applying a first set of gradient fields, receiving data information acquired by an RF coil and generating a first image; applying a second set of gradient fields in directions different than those of the first set of gradient fields, receiving data information acquired by the RF coil and generating a second image; calculating a shift of the center frequency based on the first image and the second image; and correcting the center frequency based on the shift of the center frequency.

公开(公告)号：US10690742B2

公开(公告)日：2020-06-23

申请号：US16361913

申请日：2019-03-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Lisha Nie ,  Yongchuan Lai ,  Tongzhou Wang ,  Tengfei Wang

IPC: G01R33/58 ,  G01R33/385 ,  G01R33/48 ,  G01R33/54 ,  G01R33/56

Abstract: Methods and apparatuses for calibrating a center frequency of MR and an MRI system are disclosed herein. An exemplary method comprises applying a first set of gradient fields, receiving data information acquired by an RF coil and generating a first image; applying a second set of gradient fields in directions different than those of the first set of gradient fields, receiving data information acquired by the RF coil and generating a second image; calculating a shift of the center frequency based on the first image and the second image; and correcting the center frequency based on the shift of the center frequency.

公开(公告)号：US10132891B2

公开(公告)日：2018-11-20

申请号：US15267613

申请日：2016-09-16

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jiaqi Li ,  Andrew Byshenk ,  Chinmoy Goswami ,  Tongzhou Wang

IPC: G01V3/00 ,  G01R33/48 ,  A61B6/03 ,  A61B6/00 ,  G01R33/341

Abstract: A PET-MRI system for imaging an object is provided. The PET-MRI system includes a magnetic resonance imaging sub-system, a positron emission tomography sub-system, an optical sensor, and a data processing controller. The magnetic resonance imaging sub-system includes a surface coil that acquires magnetic resonance signals from the object. The positron emission tomography sub-system acquires PET emissions from the object. The optical sensor detects at least one of a spatial location and a shape of the surface coil. The data processing controller communicates with the magnetic resonance imaging sub-system, the positron emission tomography sub-system, and the optical sensor, and utilizes at least one of the detected spatial location and the detected shape of the surface coil to correct the acquired PET emissions for attenuation.