公开(公告)号：US09829554B2

公开(公告)日：2017-11-28

申请号：US13866696

申请日：2013-04-19

Applicant: University of New Brunswick

Inventor： Frederic Goora ,  Bruce Balcom

IPC: G01V3/00 ,  G01R33/54 ,  G01R33/385 ,  G01R33/565 ,  G01R33/58

CPC classification number: G01R33/54 ,  G01R33/3852 ,  G01R33/56572 ,  G01R33/58

Abstract: Method for correcting the magnetic field gradient waveform in a magnetic resonance measurement including extracting an impulse response from the measured step response of a magnetic resonance system, determining the slew rate of the system during the step response measurement, modifying the desired output waveform such that the desired output waveform is constrained to within the slew rate and the bandwidth of the system, and determining the required pre-equalized input waveform.

公开(公告)号：US09864033B1

公开(公告)日：2018-01-09

申请号：US14469228

申请日：2014-08-26

Applicant: University of New Brunswick

Inventor： Florea Marica ,  Bruce Balcom

IPC: G01V3/00 ,  G01R33/50 ,  G01R33/48 ,  G01R33/56 ,  G01V3/14 ,  G01N24/08

CPC classification number: G01R33/50 ,  G01N24/081 ,  G01R33/4816 ,  G01V3/14

Abstract: A pure phase encode measurement method where the FID signal is encoded by a brief pure phase encode magnetic field gradient pulse. Data collection occurs once the gradient is turned off. Multiple free induction decay points acquired are identically encoded such that a full k space data set is acquired for each FID point. Fourier transformation of these data sets generates one, two or three dimensional images with consistent fields of view. The image series which results may be fit to a T2* decay function and the T2* magnetic resonance (“MR”) lifetime mapped. Fluid content (proton density) images may also be generated by this simple fitting procedure.

公开(公告)号：US08890527B1

公开(公告)日：2014-11-18

申请号：US13764729

申请日：2013-02-11

Applicant: University of New Brunswick

Inventor： Bruce Balcom ,  Sarah Vashee ,  Ben Newling ,  Bryce MacMillan

IPC: G01V3/00 ,  G01R33/565

CPC classification number: G01R33/5659 ,  G01R33/246

Abstract: Methods for measuring B1 values in an MRI sample space, generating B1 maps and using B1 maps to correct B1 profiles are disclosed.

Abstract translation: 公开了用于测量MRI样本空间中的B1值，生成B1图并使用B1图来校正B1分布的方法。