公开(公告)号：US10564237B2

公开(公告)日：2020-02-18

申请号：US15957429

申请日：2018-04-19

Applicant: Massachusetts Institute of Technology

Inventor： Ashvin Bashyam ,  Michael J. Cima ,  Matthew Li

IPC: G01R33/38 ,  A61B5/055 ,  G01R33/383

Abstract: A Unilateral Linear Halbach magnet configuration includes a central magnetized region recessed relative to adjacent magnetized regions disposed on opposite sides of the central magnetized region. The Unilateral Linear Halbach magnet configuration further includes side (or outer) magnetized regions disposed adjacent the center-adjacent magnetized regions. The center and center-adjacent magnetized regions have like-pointing magnetization vectors while the magnetization vectors of the side magnetized regions point in directions orthogonal to the magnetization vectors of the center and center-adjacent regions. Further, the magnetization vectors of the side magnetized regions point in opposite directions.

公开(公告)号：US11344217B2

公开(公告)日：2022-05-31

申请号：US14896806

申请日：2014-09-05

Applicant: Massachusetts Institute of Technology

Inventor： Michael J. Cima ,  Matthew Li ,  Christophoros C. Vassiliou ,  Negar Tavassolian ,  Lina Avancini Colucci

IPC: A61B5/055 ,  G01R33/50 ,  G01R33/383 ,  A61B5/00 ,  A61B5/02 ,  G01R33/44 ,  G01R33/46 ,  A61B5/145

Abstract: The invention features methods for detecting the hydration state or vascular volume of a subject using a device capable of nuclear magnetic resonance (NMR) measurement. The methods involve exposing a portion of a tissue of the subject in vivo to a magnetic field and RF pulse from the device to excite hydrogen nuclei of water within the tissue portion, and measuring a relaxation parameter of the hydrogen nuclei in the tissue portion, the relaxation parameter being a quantitative measure of the hydration state or vascular volume of the subject as a whole. The invention also features devices and computer-readable storage media for performing the methods of the invention.

公开(公告)号：US20180306879A1

公开(公告)日：2018-10-25

申请号：US15957429

申请日：2018-04-19

Applicant: Massachusetts Institute of Technology

Inventor： Ashvin Bashyam ,  Michael J. Cima ,  Matthew Li

IPC: G01R33/38 ,  A61B5/055

CPC classification number: G01R33/3808 ,  A61B5/055 ,  G01R33/383

Abstract: A Unilateral Linear Halbach magnet configuration includes a central magnetized region recessed relative to adjacent magnetized regions disposed on opposite sides of the central magnetized region. The Unilateral Linear Halbach magnet configuration further includes side (or outer) magnetized regions disposed adjacent the center-adjacent magnetized regions. The center and center-adjacent magnetized regions have like-pointing magnetization vectors while the magnetization vectors of the side magnetized regions point in directions orthogonal to the magnetization vectors of the center and center-adjacent regions. Further, the magnetization vectors of the side magnetized regions point in opposite directions.