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Title: Integrated microchip incorporating atomic magnetometer and microfluidic channel for NMR and MRI

Patent ·
OSTI ID:1025887

An integral microfluidic device includes an alkali vapor cell and microfluidic channel, which can be used to detect magnetism for nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI). Small magnetic fields in the vicinity of the vapor cell can be measured by optically polarizing and probing the spin precession in the small magnetic field. This can then be used to detect the magnetic field of in encoded analyte in the adjacent microfluidic channel. The magnetism in the microfluidic channel can be modulated by applying an appropriate series of radio or audio frequency pulses upstream from the microfluidic chip (the remote detection modality) to yield a sensitive means of detecting NMR and MRI.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-05CH11231
Assignee:
The Regents of the Univerisity of California (Oakland, CA)
Patent Number(s):
7,994,783
Application Number:
12/367,292
OSTI ID:
1025887
Country of Publication:
United States
Language:
English

References (8)

Subpicotesla atomic magnetometry with a microfabricated vapour cell journal November 2007
Dispersion measurements using time-of-flight remote detection MRI journal May 2007
Time-of-Flight Flow Imaging of Two-Component Flow inside a Microfluidic Chip journal January 2007
Chip-scale atomic magnetometer journal December 2004
A subfemtotesla multichannel atomic magnetometer journal April 2003
Zero-field remote detection of NMR with a microfabricated atomic magnetometer journal February 2008
Magnetic resonance imaging with an optical atomic magnetometer journal August 2006
Amplification of xenon NMR and MRI by remote detection journal July 2003